Earth Sciences

Asteroid dust found in crater closes case of dinosaur extinction

Researchers believe they have closed the case of what killed the dinosaurs, definitively linking their extinction with an asteroid that slammed into Earth 66 million years ago by finding a key piece of evidence: asteroid ...

Environment

Indian agriculture: Groundwater depletion could reduce winter cropped acreage significantly in years

India is the world's second-largest producer of wheat and rice and is home to more than 600 million farmers.

Researchers take aim at the evolution of traditional technologies

In the last 60,000 years, humans have emerged as an ecologically dominant species and have successfully colonized every terrestrial habitat. Our evolutionary success has been facilitated by a heavy reliance on an ever-advancing ...

Bearded seals are loud—but not loud enough

During mating season, male bearded seals make loud calls to attract a mate. How loud? Well, even their "quiet" call can still be as ear-rattling as a chainsaw.

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Medical Xpress

Tech Xplore

New experiences enhance learning by resetting key brain circuit

A study of spatial learning in mice shows that exposure to new experiences dampens established representations in the brain's hippocampus and prefrontal cortex, allowing the mice to learn new navigation strategies. The study, ...

Chimpanzees unite against a common enemy

In the face of threats from other groups, humans become more cohesive and cooperative with their own, an association that Charles Darwin suggested could be an evolved capacity. Now a research group at Kyoto University has ...

Can polar bears and narwhals cling on as the ice shrinks?

As part of the Journal of Experimental Biology's Special Issue dedicated to climate change, Anthony Pagano (San Diego Zoo Global, USA) and Terrie Williams (University of California, Santa Cruz, USA), discuss the impact of ...