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Cyanobacteria survive in one of the harshest environments on Earth by mining water from the rocks they live on

The structure and function of dioxygenases in histone demethylation and DNA/RNA dimethylation are discussed.

The day Folkestone was rocked by one of Kent's worst ever earthquakes  Kent Live

A part of the system CaO-SiO2–Al2O3–Fe2O3–MgO which is of relevance to iron-ore sintering has been studied in detail. For a bulk composition corresponding to 10.45 wt% CaO, 5.49 wt% MgO, 69.15 wt% Fe2O3, 13.37 wt% Al2O3 and 1.55 wt% SiO2 synthesis runs have been performed in air in the range between 1100 and 1300°C. Products have been characterized using reflected-light microscopy, electron microprobe analysis and diffraction techniques. At 1250°C, an almost phase-pure material with composition Ca2.99Mg2.67Fe3+14.58Fe2+0.77Al4.56Si0.43O36 has been obtained. The compound corresponds to the first Si-containing representative of the M14+6nO20+8n polysomatic series of so-called SFCA phases (Silico-Ferrites of Calcium and Aluminum) with n = 2 and is denoted as SFCA-III. Single-crystal diffraction investigations using synchrotron radiation at the X06DA beamline of the Swiss Light Source revealed that the chemically homogenous sample contained both a triclinic and monoclinic polytype. Basic crystallographic data are as follows: triclinic form: a = 10.3279 (2) Å, b = 10.4340 (2) Å, c = 14.3794 (2) Å, α = 93.4888 (12)°, β = 107.3209 (14)° and γ = 109.6626 (14)°, V = 1370.49 (5) Å3, Z = 2, space group P{overline 1}; monoclinic form: a = 10.3277 (2) Å, b = 27.0134 (4) Å, c = 10.4344 (2) Å, β = 109.668 (2)°, V = 2741.22 (9) Å3, Z = 4, space group P21/n. Structure determination of both modifications was successful using diffraction data from the same allotwinned crystal. A description of the observed polytypism within the framework of OD-theory is presented. Triclinic and monoclinic SFCA-III actually correspond to the two possible maximum degree of order structures based on OD-layers containing three spinel (S) and one pyroxene (P) modules (〈S3P〉). The existence of SFCA-III in industrial iron-ore sinters has yet to be confirmed. Polytypism is likely to occur in other SFCA-members (SFCA, SFCA-I) relevant to sintering as well, but has so far been neglected in the characterization of industrial samples. Our results shed light on this phenomenon and may therefore be also helpful for better interpretation of the powder diffraction patterns that are used for phase analysis of iron-ore sinters.

Archaeologists working at the Smithsonian Tropical Research Institute in Panama have discovered a cluster of 12 unusual stones in the back of a small, prehistoric rock-shelter near the town of Boquete.

The post 4,000-year-old shaman’s stones discovered near Boquete, Panama appeared first on Smithsonian Insider.

Roses, carnations and lilies are today among the most popular flowers people use to express sympathy and condolence. The simple act of sending flowers to […]

The post Funeral flowers in the Stone Age: Q&A with Smithsonian anthropologist Reuven Yeshurun appeared first on Smithsonian Insider.

In a new study in which one of humankind’s most high-tech tools was used to analyze one of its most primitive, scientists have uncovered evidence […]

The post Laser beams unveil secrets locked inside primitive stone spear points appeared first on Smithsonian Insider.

Imke K. Mandemaker, Di Zhou, Serena T. Bruens, Dick H. Dekkers, Pernette J. Verschure, Raghu R. Edupuganti, Eran Meshorer, Jeroen A. Demmers, and Jurgen A. Marteijn

Many chromatin remodeling and modifying proteins are involved in the DNA damage response by stimulating repair or inducing DNA damage signaling. Interestingly, here we identified that down regulation of the H1-interacting protein SET results in increased resistance to a wide variety of DNA damaging agents. We found that this increased resistance is not the result of an inhibitory effect of SET on DNA repair, but rather the consequence of a suppressed apoptotic response to DNA damage. We further provide evidence that the histone chaperone SET is responsible for the eviction of H1 from chromatin. Knock down of H1 in SET-depleted cells resulted in re-sensitization of cells to DNA damage, suggesting that the increased DNA damage resistance in SET-depleted cells is the result of enhanced retention of H1 on chromatin. Finally, clonogenic survival assays show that SET and p53 are epistatic in attenuating DNA damage-induced cell death. Altogether, our data show a role for SET in the DNA damage response as a regulator of cell survival following genotoxic stress.

The Smithsonian’s National Museum of Natural History recently acquired four remarkable gemstones and jewelry pieces for the Smithsonian’s National Gem Collection in celebration of the 100th anniversary of the museum.

The post National Museum of Natural History acquires gemstones in honor of its 100th anniversary appeared first on Smithsonian Insider.

The National Air and Space Museum will reopen the “Boeing Milestones of Flight Hall” July 1 in conjunction with the museum’s 40th anniversary. The two-year […]

The post Air and Space Museum’s “Boeing Milestones of Flight Hall” Reopens July 1! appeared first on Smithsonian Insider.

White-faced capuchin monkeys in Panama’s Coiba National Park habitually use hammer-and-anvil stones to break hermit crab shells, snail shells, coconuts and other food items, according […]

The post Scientists observe stone tool use by Cebus monkeys appeared first on Smithsonian Insider.

A team of psychologists, kinesiologists and archaeologists at Indiana University and elsewhere are throwing new light on a longstanding archaeological mystery: the purpose of a large number of spherical stone artifacts found at a major archaeological site in South Africa.

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The importance of 'stepping stone' patches of habitat for biodiversity has been underestimated, a new study suggests. The researchers developed a new connectivity model, which better captures the effects of stepping stones on species movement.

Above: Powhatan in the water at VT Halter Marine following a successful launch on August 11, 2018 PASCAGOULA, MISSISSIPPI – The Virginia...

A St Albans-based artist has seen her work shortlisted for Waterstones Book of the Year 2019.

Its net debt has improved by about $500 million from start to finish.

A minimum of four wells will be drilled in the initial program year, which starts in 3Q 2020.

As the Supreme Court prepares to hear arguments in two gay marriage cases, it's easy to forget how far opinions have moved on the issue.

Stone Age villages on the Orkney Islands are older than Stonehenge, but archaeologists fear that they won't be around for much longer.

Actress names new addition Bear Blu Jarecki. Alicia Silverstone has become the latest mother in the current Hollywood baby boom, giving birth to a baby boy on M

Actress comes under fire after she reveals that she chews her toddler's food before feeding it to him.

Actress and healthy living author is sourcing stories from other mothers for her new book "The Kind Mama."

Silverstone hopes to connect vegan moms who have extra breastmilk to share with others in need.

2,500-year-old stone slab could offer clues to deciphering the lost language and religion of the Etruscans.

An accident in Montana is the latest in a long and troubled line of pipeline incidents in America.

Narrator Daryl Hannah, filmmaker Leslie Iwerks and others discuss the Keystone XL pipeline battle in 'Pipe Dreams.'

Climate scientist James Hansen was arrested on Feb. 13 outside the White House while protesting the Keystone Pipeline.

Five Nebraska lawmakers say there is no rush to approve a massive pipeline that could damage the environment.

Tribal leaders are among the thousands of protesters who are trying to keep the Obama administration from giving the green light to a new pipeline.

Actress partners with Natural Resources Defense Council, asking people to join her in opposing the $7 billion project.

Amid accusations of bias and corruption, the agency's inspector general will investigate its review of the proposed oil-sands pipeline from Canada.

Actor and environmentalist says President stood up to Big Oil by delaying project and calling for more environmental reviews.

With the 1,700-mile oil pipeline now likely on hold until 2013, here's a roundup of reactions from 10 people closely involved in the debate.

The State Department has denied the proposed oil pipeline from Canada, heading off a congressionally mandated deadline of Feb. 21.

The Obama administration's move won't necessarily kill the controversial oil pipeline, but it has still drawn strong reactions from both sides of the debate.

According to the GOP's favorite media mouthpiece, the Keystone XL pipeline would have created thousands, no- tens of thousands, no- hundreds of thousands, wait-

Climate activist Bill McKibben says now is the time for the Obama administration to stand up to the richest industry on Earth.

From Michigan to Arkansas, a series of recent oil spills have raised doubts about the proposed Keystone XL oil pipeline.

Washington Post energy correspondent Steven Mufson traveled the 1,700-mile path of the controversial tar sands pipeline.

Ads supporting the pipeline are the work of 2 political offshoots of Zuckerberg's social welfare organization.

Amy Smart, Justin Chatwin, Wendie Malick and Ed Begley Jr. for the Environmental Media Association.

Miners in Australia uncover the opal-filled fossil of a dog-size herbivore named Weewarrasaurus pobeni.

Part of the Keystone oil pipeline was shut down after a 5,000-barrel leak in South Dakota, the pipeline's operator TransCanada said.

How well-versed are you with our planet's fascinating geology? Test your knowledge and find out.

'If you see me, weep,' reads one of these so-called 'hunger stones.'