Fewer crop species are feeding the world than 50 years ago, raising concerns about the resilience and nutritional value of the global food system, a study says.

Scientists say it is unlikely that any fish can survive in the oceans deeper than about 8,200m.

An ancient virus has been brought back to life after lying dormant for 30,000 years in the Siberian permafrost, scientists say.

A highly sensitive magnetic material that could transform computer hard drives and energy storage devices has been discovered.

Anger may trigger a heart attack or stroke, with a "danger window" of about two hours following an outburst, say researchers.

A "live fast, die young" life history strategy could have played a key role leading to the high tree diversity in the Amazon, scientists suggest.

Can you spot scenes from the film Gravity in our gallery of Nasa's space pictures? Try our quiz and find out.