NFL Commissioner Roger Goodell talks during a press conference at the Hilton Hotel on Sept. 19, 2014 in New York City. Goodell spoke about the NFL's failure to address domestic violence, sexual assault and drug abuse in the league.; Credit: Elsa/Getty Images

Update 1:04 p.m. Goodell: 'Same mistakes can never be repeated'

Commissioner Roger Goodell says the NFL wants to implement new personal conduct policies by the Super Bowl. At a news conference Friday, Goodell made his first public statements in more than a week about the rash of NFL players involved in domestic violence. He did not announce any specific changes, but said he has not considered resigning.

"Unfortunately, over the past several weeks, we have seen all too much of the NFL doing wrong," he said. "That starts with me."

The league has faced increasing criticism that it has not acted quickly or emphatically enough concerning the domestic abuse cases.

The commissioner reiterated that he botched the handling of the Ray Rice case.

"The same mistakes can never be repeated," he said.

Goodell now oversees all personal conduct cases, deciding guilt and penalties.

He said he believes he has the support of the NFL's owners, his bosses.

"That has been clear to me," he said.

The Indianapolis Colts' Darius Butler was among those who tweeted criticism of the press conference:

Colts tweet 1

Colts tweet 2

The commissioner and some NFL teams have been heavily criticized for lenient or delayed punishment of Rice, Adrian Peterson and other players involved in recent domestic violence cases. Less than three weeks into the season, five such cases have made headlines, the others involving Greg Hardy, Ray McDonald and Jonathan Dwyer.

Vikings star running back Peterson, Carolina defensive end Hardy and Arizona running back Dwyer are on a special commissioner's exemption list and are being paid while they go through the legal process. McDonald, a defensive end for San Francisco, continues to practice and play while being investigated on suspicion of domestic violence.

As these cases have come to light, such groups as the National Organization of Women and league partners and sponsors have come down hard on the NFL to be more responsive in dealing with them. Congress also is watching to see how the NFL reacts.

In response to the criticism, the NFL announced it is partnering with a domestic violence hotline and a sexual violence resource center.

Goodell also said in a memo to the clubs late Thursday that within the next 30 days, all NFL and team personnel will participate in education sessions on domestic violence and sexual assault. The memo said the league will work with the union in providing the "information and tools to understand and recognize domestic violence and sexual assault."

The league will provide financial, operational and promotional support to the National Domestic Violence Hotline and the National Sexual Violence Resource Center.

12:07 p.m. Roger Goodell to break silence on domestic abuse and the NFL

Roger Goodell will make his first public statements in more than a week about the rash of NFL players involved in domestic violence when he holds a news conference Friday.

The NFL commissioner will address the league's personal conduct policy. The league has faced increasing criticism it has not acted quickly or emphatically enough concerning the domestic abuse cases.

His last public appearance was at a high school in North Carolina on Sept. 10.

The commissioner and some NFL teams have been heavily criticized for lenient or delayed punishment of Ray Rice, Adrian Peterson and other players involved in recent domestic violence cases. Less than three weeks into the season, five such cases have made headlines, the others involving Greg Hardy, Ray McDonald and Jonathan Dwyer.

Vikings star running back Peterson, Carolina defensive end Hardy and Arizona running back Dwyer are on a special commissioner's exemption list and are being paid while they go through the legal process. McDonald, a defensive end for San Francisco, continues to practice and play while being investigated on suspicion of domestic violence.

As these cases have come to light, such groups as the National Organization of Women and league partners and sponsors have come down hard on the NFL to be more responsive in dealing with them. Congress also is watching to see how the NFL reacts.

In response to the criticism, the NFL announced it is partnering with a domestic violence hotline and a sexual violence resource center.

Goodell also said in a memo to the clubs late Thursday that within the next 30 days, all NFL and team personnel will participate in education sessions on domestic violence and sexual assault. The memo said the league will work with the union in providing the "information and tools to understand and recognize domestic violence and sexual assault."

The league will provide financial, operational and promotional support to the National Domestic Violence Hotline and the National Sexual Violence Resource Center.

"These commitments will enable both the hotline and NSVRC to help more people affected by domestic violence and sexual assault," Goodell said in the memo.

The National Domestic Violence Hotline provides domestic violence victims and survivors access to a national network of resources and shelters. It is available 24 hours a day, seven days a week in 170 languages. Goodell noted that the hotline received 84 percent more calls from Sept. 8-15, and the organization said more than 50 percent of those calls went unanswered because of lack of staff.

"The hotline will add 25 full-time advocates over the next few weeks that will result in an additional 750 calls a day being answered," he said.

NSVRC supports sexual violence coalitions across the United States. The NFL's initial support will be directed toward state coalitions to provide additional resources to sexual assault hotlines.

This story has been updated.

The Trump administration asked the Supreme Court to block Congress from seeking the materials, saying, "The government will suffer irreparable harm absent a stay."; Credit: Andrew Harnik/AP

The Supreme Court has temporarily put on hold the release of redacted grand jury material from the Russia investigation to a House panel.

The Trump administration is trying to block the release.

Last October, a district court judge ruled the Justice Department had to turn over the materials, which were blacked out, from former special counsel Robert Mueller's report into Russian interference in the 2016 election.

An appeals court upheld the decision, but the Trump administration, hoping to keep the evidence secret, appealed to the Supreme Court.

Chief Justice John Roberts' order temporarily stops the process. Lawyers for the House Judiciary Committee have until May 18 to file their response to the Justice Department's attempts to keep the materials from the House panel.

The Justice Department had until Monday to turn over the material following the appeals court order. But on Thursday, the Trump administration asked the Supreme Court to block Congress from seeking it, saying, "The government will suffer irreparable harm absent a stay."

This content is from Southern California Public Radio. View the original story at SCPR.org.

Rick Bright filed a complaint this week with the Office of Special Counsel, a government agency responsible for whistleblower complaints.; Credit: /Public Health Emergency via AP

Attorneys for Rick Bright, the government scientist who said he had been reassigned and subsequently filed a whistleblower complaint, say a government watchdog agrees that he should be reinstated to his post.

Bright was serving as director of the Biomedical Advanced Research and Development Authority, which is working on a vaccine to combat the coronavirus.

He said he was ousted from the position last month because he wanted to spend money on safe and vetted treatments for COVID-19 — not on ones without "scientific merit," such as hydroxychloroquine, the anti-malarial drug that President Trump and others had been touting.

Trump on Wednesday called Bright "a disgruntled employee who's trying to help the Democrats win an election."

Bright's attorneys say that the Office of Special Counsel, which hears whistleblower cases, determined there were "reasonable grounds" to believe that his removal was retaliatory and therefore prohibited.

Bright's attorneys say OSC plans to contact the Department of Health and Human Services to request that it put Bright's removal on hold for 45 days so the office can complete its investigation into the allegations.

The OSC said it "cannot comment on or confirm the status of open investigations."

In a statement to NPR, Caitlin Oakley, a spokesperson for HHS, said: "This is a personnel matter that is currently under review. However, HHS strongly disagrees with the allegations and characterizations in the complaint from Dr. Bright."

This content is from Southern California Public Radio. View the original story at SCPR.org.

A woman wearing a mask walks past closed store fronts in the Astoria neighborhood of Queens on April 15 in New York City. States are beginning to implement phased reopening plans, in part to help businesses hit hard by the coronavirus.; Credit: Johannes Eisele/AFP via Getty Images

President Trump wants states to begin relaxing stay-at-home orders and reopen businesses after the spread of the coronavirus pummeled the global economy and killed millions of jobs.

The White House coronavirus task force released guidelines on April 16 to encourage state governors to adopt a phased approach to lifting restrictions across the country. Some states have moved ahead without meeting the criteria.

The task force rejected a set of additional detailed draft recommendations for schools, restaurants, churches and mass transit systems from the Centers for Disease Control and Prevention that it considered "overly prescriptive."

A number of states have already begun to lift restrictions, allowing for businesses including hair salons, diners and tattoo parlors to once again begin accepting customers. Health experts have warned that reopening too quickly could result in a potential rebound in cases.

States are supposed to wait to begin lifting any restrictions until they have a 14-day "downward trajectory" of influenza-like illnesses and confirmed virus cases, as well as sufficient hospital capacity and testing for health care workers.

Below is a summary of the three phases as outlined by the task force (read the full guidance here):

Don't see the graphic above? Click here.

This content is from Southern California Public Radio. View the original story at SCPR.org.

Birth control pills in 1976 in New York. The birth control pill was approved by the FDA 60 years ago this week.; Credit: /Bettmann/Getty Images

Updated at 9:44 a.m. ET

As a young woman growing up in a poor farming community in Virginia in the 1940 and '50s, with little information about sex or contraception, sexuality was a frightening thing for Carole Cato and her female friends.

"We lived in constant fear, I mean all of us," she said. "It was like a tightrope. always wondering, is this going to be the time [I get pregnant]?"

Cato, 78, now lives in Columbia, S.C. She grew up in the years before the birth control pill was approved by the U.S. Food and Drug Administration, on May 9, 1960. She said teenage girls in her community were told very little about how their bodies worked.

"I was very fortunate; I did not get pregnant, but a lot of my friends did. And of course, they just got married and went into their little farmhouses," she said. "But I just felt I just had to get out."

At 23, Cato married a widower who already had seven children. They decided seven was enough.

By that time, Cato said, the pill allowed the couple to avoid having more babies — and she eventually was able to go on to college.

"It was just like going from night to day, as far as the freedom of it," Cato said. "And to know that I had control, that I had choice, that I controlled my body. It gave me a whole new lease on life."

Loretta Ross, an activist and visiting women's studies professor at Smith College, was among the first generation of young women to have access to the birth control pill throughout their reproductive years.

Ross, now 66, said by the time she came of age around 1970, the pill was giving young women more control over their fertility than previous generations had enjoyed.

"We could talk about having sex – not without consequences, because there were still STDS ... but at the same time, with more freedom than our foremothers had," Ross said. "So it changed the world."

For all it's done for women, Ross said that the pill has a complex and controversial history; it was first tested on low-income women in Puerto Rico. Ross said the pill also has limitations; she'd like to see it made available over the counter, as it is in some countries – not to mention, a pill for men.

When the pill was approved in 1960, women had few relatively few contraceptive options, and the pill offered more reliability and convenience than methods like condoms or diaphragms, said Dr. Eve Espey, chair of the Department of Ob/Gyn and Family Planning at the University of New Mexico.

"There was a huge, pent-up desire for a truly effective form of contraception, which had been lacking up to that point," Espey said.

By 1965, she said, 40% of young married women were on the pill.

For Pat Fishback, now 80 and living in Richmond, Va., the newly-available pill allowed her to delay having children in her early 20s until she'd been married for a couple of years.

"It also made having children a positive experience," Fishback said. "Because we had actually, emotionally and intellectually, gotten to the point where we really desired to have children."

It took a bit longer for unmarried women to gain widespread access to the pill and other forms of contraception: Linda Gordon, 80, a historian at New York University, remembers the stigma around single women and contraception at the time.

"When I was in college, a number of women had a wedding ring – a gold ring –that we would pass around and use when we wanted to go see a doctor to get fitted for a diaphragm," Gordon said. "In other words, there were people finding their way to do that, even then."

The pill also gave rise to a variety of other forms of hormonal contraception, many of which are popular today, Gordon said. According to the Centers for Disease Control and Prevention, nearly 13% of American women of reproductive age use the pill — making it the second most popular form of contraception, after female sterilization.

Gordon said that 60 years after the pill's approval, contraception remains a contentious political issue.

Just this week, the U.S. Supreme Court heard arguments in a case involving the birth control mandate in the Affordable Care Act. A decision on whether some institutions with religious or moral objections can deny contraceptive coverage to their employees is expected in the months to come.

This content is from Southern California Public Radio. View the original story at SCPR.org.

With the recent 22% rise in the price of uranium, Peter Epstein of Epstein Research considers the upside for Skyharbour's holdings in the Athabasca Basin.

Money manager Adrian Day discusses a general approach to the market, as well as recent developments at several companies on his list, including some buy recommendations, despite being overall cautious.

Ron Struthers of Struthers' Resource Stock Report details the value proposition of Bam Bam Resources and its flagship prospect.

David Rolf, International Vice President of the Service Employees International Union, stands in his downtown Seattle office. Rolf led the campaign to bring a $15 minimum wage to Seatac, Washington in 2013.; Credit: Ben Bergman/KPCC

As Los Angeles mulls a law that would raise the minimum wage above the current California minimum of $9 an hour, it's the latest city to jump on a trend that started as the by-product of a failed labor negotiation in the state of Washington.

The first city to enact a $15-per-hour minimum wage was SeaTac, Wash., — a tiny airport town outside Seattle. "SeaTac will be viewed someday as the vanguard, as the place where the fight started," the lead organizer of SeaTac's $15 campaign, David Rolf, told supporters in November 2013 after a ballot measure there barely passed.

Rolf never set out to raise SeaTac’s minimum wage, much less start a national movement. Speaking from a sparse corner office in downtown Seattle at the Service Employees International Union 775, which he founded in 2002, Rolf told KPCC that his original goal in 2010 was to unionize workers at SeaTac airport.

When employers – led by Alaska Airlines — played hardball, Rolf put the $15 minimum wage on the ballot as leverage. “We had some polling in SeaTac that it could pass, but it was not at all definitive,” Rolf said.

That proved prescient: In a city of just 12,108 registered voters, Rolf's staff signed up around 1,000 new voters, many of them immigrants who had never cast a ballot. The measure won by just 77 votes.

It's an irony that the new law doesn't apply to workers at the center of the minimum wage campaign: The airport workers at SeaTac. That's because the Port of Seattle, which oversees the airport, challenged the initiative, arguing that the city's new minimum wage should not apply to the nearly 5,000 workers at the airport. A county judge agreed. Supporters of the $15 wage have appealed.

Still, Rolf said, "I think people are proud that that’s what happening. There are leaders of the movement in Seattle, including our mayor, that said shortly after the victory, 'Now we have to take it everywhere else.'"

The $15 minimum wage spread to Seattle last June and to San Francisco in November. 

Why $15 an hour?

The $15 figure first came to people’s attention in a series of strikes by fast food workers that started two years ago in New York. 

“I think it’s aspirational, and it provides a clean and easy-to-understand number," Rolf said. "You can debate whether it ought to really be $14.89 or $17.12, and based upon the cost of living in different cities, you could have a different answer. But in the late 19th and early 20th century, American workers didn’t rally for 7.9 or 8.1 hour working day. They rallied for an eight-hour day.”

“What’s really remarkable about social protest movements in American history is that the radical ideas of one group are often the common sense ideas of another group in a matter of a few years," said Peter Dreier, professor of politics at Occidental College.

Rolf is hopeful the $15 minimum wage can spread to every state. But Nelson Lichtenstein, Director of the Center for the Study of Work, Labor and Democracy at the University of California, Santa Barbara, is skeptical.

“I don’t think having high wages in a few cities will mean it will spread to red state America,” he said. 

Lichtenstein said cities like L.A. have become more labor friendly, thanks largely to an influx of immigrants, but that’s not the case in the South. Oklahoma recently banned any city from setting its own minimum wage, joining at least 12 other states with similar laws, according to Paul Sonn, general counsel and program director at the National Employment Law Project.

In November, voters in four Republican-leaning states — Alaska, Arkansas, South Dakota, and Nebraska — approved higher minimum wages, but they weren’t close to $15.

A $15 dollar wage would have a much greater impact in Los Angeles than Seattle or San Francisco because the average income here is much lower than in those cities. Post-recession, income inequality has become much more of a concern for voters, which has made $15 more palatable, Sonn said.

This fall, the Los Angeles City Council enacted a $15.37 minimum wage for hotel workers that takes effect next year. A similar law has been in effect around LAX since 2007. 

But even though California cities have been allowed to set their own minimum wages for more than a decade, L.A. has never come close to doing so.

Until now.

This content is from Southern California Public Radio. View the original story at SCPR.org.

Finding affordable apartments is especially tough in Los Angeles, where 52 percent of people are renters, according to a new study.; Credit: Justin Sullivan/Getty Images

You need to earn at least $33 an hour — $68,640 a year — to be able to afford the average apartment in Los Angeles County, according to Matt Schwartz, president and chief executive of the California Housing Partnership, which advocates for affordable housing. 

That's more than double the level of the highest minimum wage being proposed by Mayor Eric Garcetti, which he argued would make it easier for workers to afford to live here. “If we pass this, this will allow more people to live their American Dream here in L.A.," Garcetti proclaimed when he announced his plan to raise the minimum wage to $13.25 by 2017. 

The $33 an hour figure is based on the average L.A. County apartment rental price of $1,716 a month, from USC's 2014 Casden Multifamily Forecast. An apartment is considered affordable when you spend no more than 30 percent of your paycheck on rent.

To earn $33 an hour or more, you'd need to have a Los Angeles job like one of the following occupations: 

• Marketing manager: $66,538 (average in L.A., according to Payscale.com)
• LAUSD teacher: $70,000 (average salary, according to LAUSD)
• Software engineer: $82,669 (average according to Payscale.com)
• Lawyer: $104,249 (average according to Payscale.com)

But many occupations typically earn far below that $33 an hour threshold in L.A. County, according to the California Housing Partnership:

• Secretaries: $36,000 ($17 an hour)
• EMT Paramedics: $25,00 ($12 an hour)
• Preschool teachers: $29,000 ($14 an hour)

That's why L.A. residents wind up spending an average of 47 percent of their income on rent, which is the highest percentage in the nation, according to UCLA's Ziman Center for Real Estate.

Naturally, people who earn the current California minimum wage of $9 an hour ($18,720 a year) would fare even worse in trying to afford an average apartment.

Raising the minimum wage to $13.25 would equal a $27,560 salary; raising it to $15.25 an hour totals $31,720 a year.

What about buying a home?

In order to afford to purchase the median-priced home in Los Angeles, you'd need to earn $96,513 a year, according to HSH.com, a mortgage information website. 

The median home price in Los Angeles is $570,500, according to the real estate website, Trulia.com.

But consider that the median income in Los Angeles is about half that: $49,497, according to census numbers from 2009-2013.

So it's no surprise that Los Angeles has been rated as the most unaffordable city to rent in America by Harvard and UCLA. 

The cost of housing has gone up so much that even raising the minimum wage to $15.25 an hour – as some on the city council have proposed doing by 2019– would not go very far in solving the problem.

“Every little bit helps, but even if you doubled the minimum wage, it wouldn’t help most low-income families find affordable rental housing in Los Angeles,” said Schwartz.

What percentage of your income to you spend on housing in Los Angeles? Let us know in the comments, on our Facebook page or on Twitter (@KPCC). You can see how affordable your neighborhood is with our interactive map.

An earlier version of this story incorrectly calculated the hourly pay rate, based on the estimated $68,640 annual pay needed to afford the average rent in L.A. County. KPCC regrets the error.

This content is from Southern California Public Radio. View the original story at SCPR.org.

The LAEDC helped Huy Fong Foods reach a compromise to keep operating its Sriracha factory in Irwindale ; Credit: Maya Sugarman/KPCC

Even as California loses manufacturing jobs, a program run by the Los Angeles County Economic Development Corporation has fought to save some. 

When a company is considering relocating to take advantage of lower costs or an easier business climate, the LAEDC’s business assistance program steps in.  

It did so in the well-publicized case of Huy Fung Foods last year.  

When the city of Irwindale filed a lawsuit against the Sriracha sauce-maker because of bad smells, politicians from other states - most notably Texas - began to circle, offering the company a new home.  

Fighting against those suitors is a  familiar dance for the nonprofit Los Angeles County Economic Development Corporation. Many states and municipalities have similar agencies, whose job it is to try to attract and keep employers.

In the Sriracha case, the LAEDC prepared an economic impact analysis, met with the company and the South Coast Air Quality Management District and negotiated a compromise that kept the hot sauce manufacturer here, according to Carrie Rogers, Vice President of Business Assistance and Development with LAEDC.

"We all love Sriracha," she said, adding that she was happy to keep the "180 jobs and really to thwart the efforts of Governor Perry from Texas to try to lure our company away to their state."

The LAEDC estimates its business assistance program has played a role in keeping or luring 200,000 jobs since 1996, when it was formed. It's being recognized by the County Board of Supervisors for those efforts today.

But plenty of jobs still leave.

In a study published in July, the LAEDC said between 1990 and 2012, California lost about 40 percent of its manufacturing jobs – 842,180. 

"We compete internationally so a lot of our competitors have gone to Mexico," said Jeff Hynes, CEO of Covina-based Composites Horizons Incorporated, which makes ceramic structures for jet engines. "A week doesn’t go by that I don’t get a call from an economic development corp out of Texas or the South."

He scored a big contract recently and needed to expand fast to begin fulfilling orders. 

"Los Angeles  - in our particular industry - has a very good supplier base with materials and equipment," he said "but certainly facility costs are lower in other areas of the state and country."  

He said the LAEDC helped him get the permits quickly to buy and modify another building on its street and they decided to stay put. 

Composites Horizons currently employs 200 people but plans to add 50 employees this year and another 50 next year, he said. 

Rogers, of the LAEDC, said that may not seem like much, but it's important to support businesses like this one.

"When you take a step back and think about it, here’s a company that’s growing when many businesses aren’t," she said. "We know there are suppliers that feed into Composites Horizons. So when they get millions of dollars worth of contracts, we know that many more companies and employees around the county will be employed doing work directly for this company."

This content is from Southern California Public Radio. View the original story at SCPR.org.

People using a coworking space.; Credit: Cross Campus

In a sign of increased desire of professionals to work remotely, the successful Santa Monica shared workspace Cross Campus is opening a second location in Pasadena later this month, and the company hopes to open eight others in Southern California and beyond in the next two years. 

Dubbed by one user as  the “nerve center” of the Silicon Beach tech scene, Cross Campus opened its membership-based workspace facility in Santa Monica in 2012.   

But co-founder Ronen Olshansky said the shared workspace phenomenon isn't limited to coders. 

"Fewer and fewer people are making the traditional drive into the corporate office," Olshansky said. "They're working remotely as professionals, going off on their own as freelancers, or they're starting their own companies as entrepreneurs."  

A forecast from Forrester Research says that 43 percent of workers will telecommute by 2016, compared to estimates of about a quarter of the workforce telecommuting last year. 

Olshansky said that, for many people, working from home or in a coffee shop isn't productive. 

That's led shared workspaces to pop up in Los Angeles, Culver City and Santa Monica. Among them: Maker City L.A., WeWork, NextSpace, Coloft and Hub LA.  

Los Angeles-based tech investor David Waxman said these kind of shared spaces are crucial for the early stages of tech ventures.

"When you’re just starting out, and capital is very scarce, having not to commit to an entire office but having part of an office is very important," Waxman said.  “There comes a collective energy when a bunch of entrepreneurs get together in the same space, even if they’re not working on the same project."

And he said Pasadena is a good choice for a shared workspace.

"It is the home of Caltech, the Arts Center, and IdeaLab — probably the world’s first tech incubator — started there," he said.

But he said the need isn't limited to Pasadena.

"In Silver Lake, in South Pasadena, in Glendale, you see a lot of little pockets of  people getting together, and as soon as there’s a critical mass, we’ll see co-working spaces like Cross Campus come into being," said Waxman, who named his investment firm TenOneTen after the two freeways that connect Santa Monica and the Westside to Pasadena. 

Alex Maleki of IdeaLab in Pasadena is happy a well-known company is opening up in his city. 

"Anything that helps attract talent and capital to the region," Maleki said, "is absolutely fantastic."

This content is from Southern California Public Radio. View the original story at SCPR.org.

Full Text:

The molecular mechanism used by many bacteria to kill neighboring cells has redundancy built into its genetic makeup, which could allow for the mechanism to be expressed in different environments, say researchers at Penn State and the University of Wisconsin-Madison. Their new study provides insights into the molecular mechanisms of competition among bacteria. "Many organisms, including humans, acquire bacteria from their environment," said Tim Miyashiro, a biochemist and molecular biologist at Penn State and the leader of the research team. "These bacteria can contribute to functions within the host organism, like how our gut bacteria help us digest food. We're interested in the interactions among bacteria cells, and between bacteria and their hosts, to better understand these mutually beneficial symbiotic relationships." Cells of the bioluminescent bacteria Vibrio fisheri take up residence in the light organ of newly hatched bobtail squid. At night, the bacteria produce a blue glow that researchers believe obscures a squid's silhouette and helps protect it from predators. The light organ has pockets, or crypts, in the squid's skin that provide nutrients and a safe environment for the bacteria. "When the squid hatches, it doesn't yet have any bacteria in its light organ," said Miyashiro. "But bacteria in the environment quickly colonize the squid's light organ." Some of these different bacteria strains can coexist, but others can't. "Microbial symbioses are essentially universal in animals, and are crucial to the health and development of both partners," says Irwin Forseth, a program director in the National Science Foundation's Division of Integrative Organismal Systems, which funded the research. "The results from this study highlight the role small genetic changes can play in microbe interactions. Increased understanding will allow us to better predict organisms' performance in changing environments."

Image credit: Andrew Cecere

Full Text:

A new study shows that graphene sheets can block the signals mosquitoes use to identify a blood meal, potentially enabling a new chemical-free approach to mosquito bite prevention. Researchers showed that multilayer graphene can provide a twofold defense against mosquito bites. The ultra-thin yet strong material acts as a barrier that mosquitoes are unable to bite through. At the same time, experiments showed that graphene also blocks chemical signals mosquitoes use to sense that a blood meal is near, blunting their urge to bite in the first place. The findings suggest that clothing with a graphene lining could be an effective mosquito barrier.

Image credit: Hurt Lab/Brown University

The National Science Foundation: Creating knowledge to transform our future

Full Text:

How do galaxies such as our Milky Way come into existence? How do they grow and change over time? The science behind galaxy formation has long been a puzzle, but a University of Arizona-led team of scientists is one step closer to finding answers, thanks to supercomputer simulations. Observing real galaxies in space can only provide snapshots in time, so researchers who study how galaxies evolve over billions of years need to use computer simulations. Traditionally, astronomers have used simulations to invent theories of galaxy formation and test them, but they have had to proceed one galaxy at a time. Peter Behroozi of the university's Steward Observatory and colleagues overcame this hurdle by generating millions of different universes on a supercomputer, each according to different physical theories for how galaxies form. The findings challenge fundamental ideas about the role dark matter plays in galaxy formation, the evolution of galaxies over time and the birth of stars. The study is the first to create self-consistent universes that are exact replicas of the real ones -- computer simulations that each represent a sizeable chunk of the actual cosmos, containing 12 million galaxies and spanning the time from 400 million years after the Big Bang to the present day. The results from the "UniverseMachine," as the authors call their approach, have helped resolve the long-standing paradox of why galaxies cease to form new stars even when they retain plenty of hydrogen gas, the raw material from which stars are forged. The research is partially funded by NSF's Division of Physics through grants to UC Santa Barbara's Kavli Institute for Theoretical Physics and the Aspen Center for Physics.

Image credit: NASA/ESA/J. Lotz and the HFF Team/STScI

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