The use of hard X-ray transmission nano- and microdiffraction to perform in situ stress and strain measurements during deformation has recently been demonstrated and used to investigate many thin film systems. Here a newly commissioned sample environment based on a commercially available nanoindenter is presented, which is available at the NanoMAX beamline at the MAX IV synchrotron. Using X-ray nanoprobes of around 60–70 nm at 14–16 keV and a scanning step size of 100 nm, we map the strains, stresses, plastic deformation and fracture during nanoindentation of industrial coatings with thicknesses in the range of several micrometres, relatively strong texture and large grains. The successful measurements of such challenging samples illustrate broad applicability. The sample environment is openly accessible for NanoMAX beamline users through the MAX IV sample environment pool, and its capability can be further extended for specific purposes through additional available modules.

The X-ray emission spectrometer at SPring-8 BL07LSU has recently been upgraded with advanced modifications that enable the rotation of the spectrometer with respect to the scattering angle. This major upgrade allows the scattering angle to be flexibly changed within the range of 45–135°, which considerably simplifies the measurement of angle-resolved X-ray emission spectroscopy. To accomplish the rotation system, a sophisticated sample chamber and a highly precise spectrometer rotation mechanism have been developed. The sample chamber has a specially designed combination of three rotary stages that can smoothly move the connection flange along the wide scattering angle without breaking the vacuum. In addition, the spectrometer is rotated by sliding on a flat metal surface, ensuring exceptionally high accuracy in rotation and eliminating the need for any further adjustments during rotation. A control system that integrates the sample chamber and rotation mechanism to automate the measurement of angle-resolved X-ray emission spectroscopy has also been developed. This automation substantially streamlines the process of measuring angle-resolved spectra, making it far easier than ever before. Furthermore, the upgraded X-ray emission spectrometer can now also be utilized in diffraction experiments, providing even greater versatility to our research capabilities.

X-ray spectroscopy is a valuable technique for the study of many materials systems. Characterizing reactions in situ and operando can reveal complex reaction kinetics, which is crucial to understanding active site composition and reaction mechanisms. In this project, the design, fabrication and testing of an open-source and easy-to-fabricate electrochemical cell for in situ electrochemistry compatible with X-ray absorption spectroscopy in both transmission and fluorescence modes are accomplished via windows with large opening angles on both the upstream and downstream sides of the cell. Using a hobbyist computer numerical control machine and free 3D CAD software, anyone can make a reliable electrochemical cell using this design. Onion-like carbon nanoparticles, with a 1:3 iron-to-cobalt ratio, were drop-coated onto carbon paper for testing in situ X-ray absorption spectroscopy. Cyclic voltammetry of the carbon paper showed the expected behavior, with no increased ohmic drop, even in sandwiched cells. Chronoamperometry was used to apply 0.4 V versus reversible hydrogen electrode, with and without 15 min of oxygen purging to ensure that the electrochemical cell does not provide any artefacts due to gas purging. The XANES and EXAFS spectra showed no differences with and without oxygen, as expected at 0.4 V, without any artefacts due to gas purging. The development of this open-source electrochemical cell design allows for improved collection of in situ X-ray absorption spectroscopy data and enables researchers to perform both transmission and fluorescence simultaneously. It additionally addresses key practical considerations including gas purging, reduced ionic resistance and leak prevention.

This work investigates the performance of the electrospray aerosol generator at the European X-ray Free Electron Laser (EuXFEL). This generator is, together with an aerodynamic lens stack that transports the particles into the X-ray interaction vacuum chamber, the method of choice to deliver particles for single-particle coherent diffractive imaging (SPI) experiments at the EuXFEL. For these experiments to be successful, it is necessary to achieve high transmission of particles from solution into the vacuum interaction region. Particle transmission is highly dependent on efficient neutralization of the charged aerosol generated by the electrospray mechanism as well as the geometry in the vicinity of the Taylor cone. We report absolute particle transmission values for different neutralizers and geometries while keeping the conditions suitable for SPI experiments. Our findings reveal that a vacuum ultraviolet ionizer demonstrates a transmission efficiency approximately seven times greater than the soft X-ray ionizer used previously. Combined with an optimized orifice size on the counter electrode, we achieve >40% particle transmission from solution into the X-ray interaction region. These findings offer valuable insights for optimizing electrospray aerosol generator configurations and data rates for SPI experiments.

Metal-organic frameworks (MOFs) exhibit structural flexibility induced by temperature and guest adsorption, as demonstrated in the structural breathing transition in certain MOFs between narrow-pore and large-pore phases. Soft modes were suggested to entropically drive such pore breathing through enhanced vibrational dynamics at high temperatures. In this work, oxygen K-edge resonant X-ray emission spectroscopy of the MIL-53(Al) MOF was performed to selectively probe the electronic perturbation accompanying pore breathing dynamics at the ligand carboxyl­ate site for metal–ligand interaction. It was observed that the temperature-induced vibrational dynamics involves switching occupancy between antisymmetric and symmetric configurations of the carboxyl­ate oxygen lone pair orbitals, through which electron density around carboxyl­ate oxygen sites is redistributed and metal–ligand interactions are tuned. In turn, water adsorption involves an additional perturbation of π orbitals not observed in the structural change solely induced by temperature.

A high-flux beamline optimized for non-resonant X-ray emission spectroscopy (XES) in the tender X-ray energy range has been constructed at the BESSY II synchrotron source. The beamline utilizes a cryogenically cooled undulator that provides X-rays over the energy range 2.1 keV to 9.5 keV. This energy range provides access to XES [and in the future X-ray absorption spectroscopy (XAS)] studies of transition metals ranging from Ti to Cu (Kα, Kβ lines) and Zr to Ag (Lα, Lβ), as well as light elements including P, S, Cl, K and Ca (Kα, Kβ). The beamline can be operated in two modes. In PINK mode, a multilayer monochromator (E/ΔE ≃ 30–80) provides a high photon flux (1014 photons s−1 at 6 keV and 300 mA ring current), allowing non-resonant XES measurements of dilute substances. This mode is currently available for general user operation. X-ray absorption near-edge structure and resonant XAS techniques will be available after the second stage of the PINK commissioning, when a high monochromatic mode (E/ΔE ≃ 10000–40000) will be facilitated by a double-crystal monochromator. At present, the beamline incorporates two von Hamos spectrometers, enabling time-resolved XES experiments with time scales down to 0.1 s and the possibility of two-color XES experiments. This paper describes the optical scheme of the PINK beamline and the endstation. The design of the two von Hamos dispersive spectrometers and sample environment are discussed here in detail. To illustrate, XES spectra of phosphorus complexes, KCl, TiO2 and Co3O4 measured using the PINK setup are presented.

A broadband online X-ray spectrometer has been designed and commissioned at the SUD beamline of the Shanghai Soft X-ray Free-Electron Laser Facility, which can deliver both SASE and seeded FEL pulses to user experiments, spanning the photon energy range of 50–620 eV. The resolving powers of the spectrometer calibrated via online measurement at 92 eV and 249 eV are ∼20000 and ∼15000, respectively, and the absolute photon energy is characterized by an electron time-of-flight spectrometer. The high energy resolution provided by the spectrometer can differentiate the fine structure in the FEL spectrum, to determine its pulse length.

Errors in variable subscripts, equations and Fig. 8 in Section 3.2 of the article by Lotze et al. [(2024). J. Synchrotron Rad. 31, 42–52] are corrected.

Ultra-high-speed synchrotron-based hard X-ray (i.e. above 10 keV) imaging is gaining a growing interest in a number of scientific domains for tracking non-repeatable dynamic phenomena at spatio-temporal microscales. This work describes an optimized indirect X-ray imaging microscope designed to achieve high performance at micrometre pixel size and megahertz acquisition speed. The entire detector optical arrangement has an improved sensitivity within the near-ultraviolet (NUV) part of the emitted spectrum (i.e. 310–430 nm wavelength). When combined with a single-crystal fast-decay scintillator, such as LYSO:Ce (Lu2−xYxSiO5:Ce), it exploits the potential of the NUV light-emitting scintillators. The indirect arrangement of the detector makes it suitable for high-dose applications that require high-energy illumination. This allows for synchrotron single-bunch hard X-ray imaging to be performed with improved true spatial resolution, as herein exemplified through pulsed wire explosion and superheated near-nozzle gasoline injection experiments at a pixel size of 3.2 µm, acquisition rates up to 1.4 MHz and effective exposure time down to 60 ps.

Here, a morphologically based approach is used for the in situ characterization of 3D growth rates of facetted crystals from the solution phase. Crystal images of single crystals of the β-form of l-glutamic acid are captured in situ during their growth at a relative supersaturation of 1.05 using transmission optical microscopy. The crystal growth rates estimated for both the {101} capping and {021} prismatic faces through image processing are consistent with those determined using reflection light mode [Jiang, Ma, Hazlehurst, Ilett, Jackson, Hogg & Roberts (2024). Cryst. Growth Des. 24, 3277–3288]. The growth rate in the {010} face is, for the first time, estimated from the shadow widths of the {021} prismatic faces and found to be typically about half that of the {021} prismatic faces. Analysis of the 3D shape during growth reveals that the initial needle-like crystal morphology develops during the growth process to become more tabular, associated with the Zingg factor evolving from 2.9 to 1.7 (>1). The change in relative solution supersaturation during the growth process is estimated from calculations of the crystal volume, offering an alternative approach to determine this dynamically from visual observations.

The design and first results of a high-transmission soft X-ray spectrometer operated at the X-SPEC double-undulator beamline of the KIT Light Source are presented. As a unique feature, particular emphasis was placed on optimizing the spectrometer transmission by maximizing the solid angle and the efficiencies of spectrometer gratings and detector. A CMOS detector, optimized for soft X-rays, allows for quantum efficiencies of 90% or above over the full energy range of the spectrometer, while simultaneously offering short readout times. Combining an optimized control system at the X-SPEC beamline with continuous energy scans (as opposed to step scans), the high transmission of the spectrometer, and the fast readout of the CMOS camera, enable the collection of entire rapid resonant inelastic soft X-ray scattering maps in less than 1 min. Series of spectra at a fixed energy can be taken with a frequency of up to 5 Hz. Furthermore, the use of higher-order reflections allows a very wide energy range (45 to 2000 eV) to be covered with only two blazed gratings, while keeping the efficiency high and the resolving power E/ΔE above 1500 and 3000 with low- and high-energy gratings, respectively.

The Federal Trade Commission (FTC) has...

Tim Cook, chief executive officer of Apple Inc., speaks during an event in 2018. Apple is one of 310 companies calling on the Biden administration to slash carbon emissions.; Credit: David Paul Morris/Bloomberg via Getty Images

More than 300 businesses have signed an open letter calling on the Biden administration to reduce greenhouse gas emissions in the United States to at least half of 2005 levels by 2030. That would nearly double a previous target set by former President Barack Obama in 2015, who pledged a 25 to 28% reduction by 2025.

The United States is not currently on track to meet either goal.

The signatories include some of largest companies in the United States, including Walmart, Apple, McDonald's and Starbucks. "A bold 2030 target is needed to catalyze a zero-emissions future, spur a robust economic recovery, create millions of well-paying jobs, and allow the U.S. to 'build back better' from the pandemic," the letter said, echoing the president's economic recovery slogan.

A 50% reduction target would put the Biden administration in line with what groups such as the United Nations and National Academies of Science say is necessary to mitigate the worst impacts of climate change.

In a March statement calling for the same reductions target, the environmental advocacy group Natural Resources Defense Council said such a plan would "help pull the country out of the pandemic-induced recession by putting millions of Americans to work" and inspire more ambitious international climate action ahead of a major United Nations climate conference this November.

Like President Joe Biden's campaign promise to guide the United States to carbon-neutrality by the middle of the century, a 50% emissions reduction target would require steeper emissions cuts than the country has ever achieved.

In 2019, greenhouse gas emissions were approximately 13% below 2005 levels, a decrease of just 1.8% from the previous year.

The Biden administration has identified climate action as one of its top four priorities and has named prominent, experienced Washington insiders, including former Secretary of State John Kerry and former EPA administrator Gina McCarthy, to oversee climate policy efforts at the White House.

As NPR's Danielle Kurtzleben has previously reported, activists on the left are cautiously optimistic about the administration's climate plan after expressing doubts about Biden's climate record during the Democratic primary.

Sunrise Movement, a youth-led climate group that champions the Green New Deal, gave candidate Biden's initial climate plan an "F" grade. Now, the group's executive director Varshini Prakash is publicly celebrating his administration's latest climate-focused $2 trillion infrastructure bill — including its commitment to spend 40% of the infrastructure plan's money on disadvantaged communities and launch a jobs program called the Civilian Climate Corps.

New York Democratic Rep. Alexandria Ocasio-Cortez told NPR earlier this month that she feels that Biden has ultimately come around to the side of progressives on climate issues. She said: "As much as I think some parts of the party try to avoid saying 'Green New Deal' and really dance around and try to not use that term, ultimately, the framework I think has been adopted."

The emphasis on climate comes as a sharp departure from the Trump administration, which withdrew the United States from the Paris Agreement and set no emissions reductions targets.

Signatories to the Paris deal, which Biden rejoined on the day he was sworn into office, are all required to set these targets — formally known as nationally determined contributions, or NDCs.

The agreement also encourages nations to revise their goals every five years, in hopes that the proposals become more ambitious as the cost of environmental reform goes down.

Since the Paris agreement was first agreed to in 2015, though, just fifty of the deal's nearly 200 signatories have submitted revised targets. A recent U.N. analysis of international climate action found that many countries were doing far too little to reduce emissions for the world to avoid the worst effects of climate change.

So far, the White House has not indicated exactly how ambitious their plan will be. An announcement is expected in the coming days as the White House prepares for its Earth Day climate summit with world leaders, scheduled for Thursday, April 22.

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

Commissioner Barger was recognized as �a leader with insight and determination� and a person of �trust, integrity, responsibility, and concern for fellow citizens� in a Distinguished Public Service Award presented to him during the meeting.

The agenda for the next meeting of the Catawba County Board of Commissioners, 9:30 a.m., Monday, April 4, 2011, 1924 Courthouse, Newton, is now available.

County programs which developed QR (Quick Response) codes for building permits; reach families affected by economic distress, and serve as an ongoing, immediate source of food for students during weekends and extended breaks from school; and promote healthy, sustainable policies that improve physical activity and nutrition in schools were honored.

New State food rules recently put in place are expected to enforce safe food handling and reduce transmission of food-borne illness.

Lori A. Mathes was appointed by the Catawba County Board of Commissioners as the County�s new Tax Collector, based upon staff�s recommendation, at the Board�s meeting on February 18, 2013. Mathes served as Chief Financial Officer for Mental Health Partners of Hickory for eight years, responsible for overseeing the agency�s expenditures and revenues, its accounting policies and procedures.

Synopsis of Catawba County Board of Commissioners meeting of December 16, 2013.

Catawba County Board of Commissioners adopts resolution supporting citizen participation in government through elections in Catawba County.

Lisa Przekop, director of admissions at University of California, Santa Barbara, says that many high schoolers this year wrote their application essays about depression and anxiety during the pandemic.; Credit: Patricia Marroquin/Moment Editorial/Getty Images

College-bound high schoolers are making their final deliberations ahead of May 1, the national deadline to pick a school. That day will mark the end of a hectic admissions season drastically shaped by the COVID-19 pandemic.

Many colleges dropped standardized testing requirements, and because some high schools gave pass/fail grades and canceled extracurriculars and sports, admissions counselors had to change how they read and evaluate applications.

"[It was] definitely the craziest of all my 36 years, without a doubt," says Lisa Przekop, director of admissions at the University of California, Santa Barbara.

The UC school system received the most applications in the United States.

Like many others, Przekop says all of her staff has been working remotely throughout the pandemic. But if pivoting to working from home wasn't a challenge enough, Przekop says the school saw an increase in applications of 16%.

"On top of all that, we had to devise a way of doing our admissions selection process without the use of SAT or ACT scores," she says. "So any one of those things would have been a major change, but to have all of them at the same time was beyond anything really that I could've imagined."

Przekop spoke with All Things Considered about how what counselors looked for in applications this year changed, what topics they saw in admissions essays and how the process might have actually improved in spite of the pandemic.

This interview has been edited for length and clarity.

Interview Highlights

Has it all added up to more time spent on every individual application?

Quick answer, yes. Things are much more nuanced now. And although a student may have, for instance, planned to do certain activities, well many of those activities were canceled. The other big difference was students were a lot more depressed this year, obviously. Everybody's more anxious, including students. They're applying for college which is stressful in and of itself. And so what we found is a lot of students used their essays to talk about depression, anxiety, things like this. To read essay after essay after essay about depression, anxiety, stress — is taxing. And so we really had to encourage staff to take more breaks as they were reviewing. So it definitely slowed the whole process down at a time when we had more applications to review.

Can you give any insight into what you are basing your decisions on this year?

Absolutely. Maybe in the past I would've focused on that GPA right away. Now when I'm looking at that academic picture, I have to look at the fact that did the student challenge themselves as much as they could have? Were the courses even available? Do I see any trends in their academic performance? If their spring term of last year, their junior year, was all pass/no pass, can I safely assume that they did well in those courses? And that's where you really had to rely on what the students shared in their essays to try to piece that together.

Are you noticing greater diversity in the students applying to UC?

In terms of ethnic diversity, yes, we are seeing that. In terms of diversity of experience — for instance, first generation students and students with lots of different socioeconomic backgrounds — we're definitely seeing that. I'm seeing students who are very committed to the environment more so than i've seen before. I'm seeing students who are more politically aware and active than I've seen before. So I'm definitely seeing a pattern of behaviors that look a little bit different than students in the past.

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

; Credit: /Rob Dobi for NPR

When someone applies to college, there's often a box or a section on the application that asks if they have any relatives who attended the university —perhaps a parent or a cousin. This is called "legacy," and for decades it's given U.S. college applicants a leg up in admissions. But no longer in Colorado's public colleges.

On Tuesday, Colorado became the first state to do away with that admissions boost, when Democratic Gov. Jared Polis signed a ban on the practice into law. The governor also signed a bill that removes a requirement that public colleges consider SAT or ACT scores for freshmen, though the new law still allows students to submit test scores if they wish.

Both moves are aimed at making higher education access more equitable. According to the legislation, 67% of middle- to high-income students in Colorado enroll in bachelor's degree programs straight from high school, while only 47% of low-incomes students do. There are also major differences when it comes to race, with white students far more likely to enroll in college.

Legacy admissions have long been a target for reform. In a 2018 survey of admissions directors by Inside Higher Ed, 42% of private institutions and 6% of public institutions said they consider legacy status as a factor in admissions. Some of the nation's largest public universities do not consider legacy, including both the University of California and the California State University systems. However, private colleges in California have reported using legacy as a way to encourage philanthropic giving and donations.

During the pandemic, many colleges backed off on using SAT and ACT scores in admissions. Research has shown — and lawsuits have argued -- that the tests, long used to measure aptitude for college, are far more connected to family income and don't provide meaningful information about a student's ability to succeed in college. Wealthier families are also more likely to pay for test prep courses, or attend schools with curriculums that focus on the exams.

As pandemic restrictions loosen up, and in-person testing resumes, some universities have begun to re-incorporate the SAT and ACT into their admissions. But others have made the temporary changes permanent. This spring, the University of California system agreed to continue a test-free admissions policy through 2025. California sends the largest number of high school students to U.S. colleges, and if the UC system no longer uses the tests, its unclear whether those students will be interested in applying to other schools that do require them.

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

Incineration is widely used in the United States to reduce the volume of waste. Hundreds of incinerators -- including industrial kilns, boilers, and furnaces -- combust municipal and hazardous waste, while many more are used to burn medical waste.

By expending too many resources to inspect cleaner low-emitting vehicles, coupled with a lack of effective ways to deal with the dirtiest ones, states are missing opportunities to reduce air pollution.

Current federal tax provisions have minimal net effect on greenhouse gas emissions, according to a new report from the National Research Council.

There is no substitute for dramatic reductions in greenhouse gas emissions to mitigate the negative consequences of climate change, a National Research Council committee concluded in a two-volume evaluation of proposed climate-intervention techniques.

To make the world safer against future infectious disease threats, national health systems should be strengthened, the World Health Organization’s emergency and outbreak response activities should be consolidated and bolstered, and research and development should be enhanced, says a new Policy Forum article that appears in the May 19 edition of PLOS Medicine.

A new report from the National Academies of Sciences, Engineering, and Medicine that examines the regulations governing federally funded research recommends that Congress authorize and the president appoint an independent national commission to examine and update the ethical, legal, and institutional frameworks governing research involving human subjects.

Efforts to control brucellosis in the Greater Yellowstone Area (GYA) should focus on reducing the risk of transmission from elk, which are now viewed as the primary source of the infection in new cases occurring in cattle and domestic bison, says a new report by the National Academies of Sciences, Engineering, and Medicine.

The Advanced Research Projects Agency-Energy (ARPA-E) is making progress toward achieving its statutory mission and goals, says a new congressionally mandated report by the National Academies of Sciences, Engineering, and Medicine.

NASA’s large strategic missions like the Hubble Space Telescope, the Curiosity rover on Mars, and the Terra Earth observation satellite are essential to maintaining the United States’ global leadership in space exploration and should continue to be a primary component of a balanced space science program that includes large, medium, and smaller missions, says a new report by the National Academies of Sciences, Engineering, and Medicine.

The U.S. should take bold steps to improve measurement, monitoring, and inventories of methane emissions caused by human activities, says a new report from the National Academies of Sciences, Engineering, and Medicine.

The current process for planetary protection policy development is inadequate to respond to increasingly complex solar system exploration missions, says a new report from the National Academies of Sciences, Engineering, and Medicine.

To answer significant questions about planetary systems, such as whether our solar system is a rare phenomenon or if life exists on planets other than Earth, NASA should lead a large direct imaging mission – an advanced space telescope – capable of studying Earth-like exoplanets orbiting stars similar to the sun, says a new congressionally mandated report by the National Academies of Sciences, Engineering, and Medicine.

To advance the search for life in the universe, NASA should support research on a broader range of biosignatures and environments, and incorporate the field of astrobiology into all stages of future exploratory missions, says a new congressionally mandated report from the National Academies of Sciences, Engineering, and Medicine.

A new report from the National Academies of Sciences, Engineering, and Medicine outlines a research agenda for improving the commercial viability of technologies that turn greenhouse gases from the burning of fossil fuels into useful products such as fuels, construction materials, and chemicals.

An international commission has been convened by the U.S. National Academy of Medicine, the U.S. National Academy of Sciences, and the Royal Society of the U.K., with the participation of science and medical academies around the world, to develop a framework for scientists, clinicians, and regulatory authorities to consider when assessing potential clinical applications of human germline genome editing.

Last week, the International Commission on the Clinical Use of Human Germline Genome Editing held its first public meeting at the National Academy of Sciences building in Washington, D.C.

The International Commission on the Clinical Use of Human Germline Genome Editing is tasked with identifying the scientific, medical, and ethical requirements to consider when assessing potential clinical applications of human germline genome editing — if society concludes that heritable human genome editing applications are acceptable.

This summer, as COVID-19 continued its spread across the U.S., the National Academies brought together engineers, virologists, public health experts, and others for a meeting to dive into the rapidly evolving science of COVID-19 airborne transmission.

Reflections on Commercial Crew and Cargo Missions from Charles F. Bolden Jr., former NASA administrator (2009–17).

Significantly reducing lead emissions from gasoline-powered aircraft will require the leadership and strategic guidance of the Federal Aviation Administration (FAA) and a broad-based and sustained commitment by other government agencies and the nation’s pilots, airport managers, aviation fuel and service suppliers, and aircraft manufacturers, says a new congressionally mandated report from the National Academies of Sciences, Engineering, and Medicine.

Achieving net-zero carbon emissions in the U.S. by 2050 is feasible and would not only help address climate change but also build a more competitive economy, increase high-quality jobs, and help address social injustice in the energy system, says a new report from the National Academies of Sciences, Engineering, and Medicine.

The U.S. Department of Energy (DOE) and private industry should invest now in order to have an operational fusion pilot plant in the 2035-2040 time frame, says Bringing Fusion to the U.S. Grid, a new report from the National Academies of Sciences, Engineering, and Medicine.

Increased use of zero emission vehicles (ZEVs) presents the greatest opportunity to improve the energy efficiency of light-duty vehicles — i.e., passenger vehicles and light trucks — over the period of 2025-2035, says a new congressionally mandated report from the National Academies of Sciences, Engineering, and Medicine.

Science academies from the G-7 nations today issued three statements recommending that their governments take urgent action to build a net-zero emissions, climate-resilient future, reverse global declines in biodiversity, and improve data-sharing for future health emergencies.

Some of NASA’s robotic missions to Mars could be subject to less stringent bioburden requirements, which are designed to prevent the unintentional transport of Earth-based microbes, without interfering with searches for indigenous life on the planet.

A new report from the Intergovernmental Panel on Climate Change (IPCC) warns the increasingly numerous and widespread impacts of climate change may soon overcome our ability to adapt, unless action is taken to reduce emissions.

A presidential commission on bioethics has not been appointed since 2017. The Biden administration should reinstate a presidential bioethics advisory commission to help inform policy decisions that have bioethical implications, urge the NAS and NAM presidents and other experts.

A new decadal survey presents a comprehensive plan for the fields of planetary science and astrobiology, identifying priority missions, planetary defense efforts, strategic technology and infrastructure investments, and ways to support the profession.