What is creating gullies on Vesta?

(Phys.org)—In a preliminary analysis of images from NASA's Dawn mission, scientists have spotted intriguing gullies that sculpt the walls of geologically young craters on the giant asteroid Vesta. Led by Jennifer Scully, ...

Study: Large, old trees in decline

(Phys.org)—The largest living organisms on the planet, the big, old trees that harbour and sustain countless birds and other wildlife, are dying. A report by three of the world's leading ecologists in today's issue of the ...

Charitum Montes: A cratered winter wonderland

(Phys.org)—The high-resolution stereo camera on ESA's Mars Express imaged the Charitum Montes region of the Red Planet on 18 June, near to Gale crater and the Argyre basin featured in our October and November image releases.

Little telescope spies gigantic galaxy clusters

(Phys.org)—Our solar system, with its colorful collection of planets, asteroids and comets, is a fleck in the grander cosmos. Hundreds of billions of solar systems are thought to reside in our Milky Way galaxy, which is ...

Nanostructures triple organic solar cells efficiency

Princeton researchers have found a simple and economic way to nearly triple the efficiency of organic solar cells, the cheap and flexible plastic devices that many scientists believe could be the future of solar power.

New study sheds light on how Salmonella spreads in the body

Findings of Cambridge scientists, published today in the journal PLoS Pathogens, show a new mechanism used by bacteria to spread in the body with the potential to identify targets to prevent the dissemination of the infection ...

Stem cell pioneer sues Nobel assembly in US

A pioneer of stem cell research is suing the assembly that awards the Nobel medicine prize, in a first such lawsuit, over claims it made about this year's winners, a spokeswoman said Thursday.

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