51动漫

round, grey blob on micrograph

Earth

Shooting stars show Earth had oxygen eons before we thought

Tiny meteorites discovered in Australia show that Earth's air had some oxygen in it at a time when no one thought it did 鈥� 2.7 billion years ago

Space

Little galaxy’s own stars cast 95 per cent of its oxygen away

Earth

Ocean鈥檚 hidden green plankton revealed by fixing glitch in model

Space

The Martian: The science of surviving a space catastrophe

Earth

Hidden oasis of oxygen suggests life took first breath in lakes

What is artificial blood and why is the UK going to trial it?

Technology

One Per Cent

Earth

Secrets of the home: The chemical reactor you live in

Life

Volcanic iron delayed explosion of life on Earth

Earth

Pacific dead zone has been shrinking for a century

Global warming should cause low-oxygen zones in the ocean to expand, driving out marine animals, but a few zones may buck the trend

Earth

Swimming, climbing robots explore the hostile Arctic

Health

Tibetan altitude gene came from extinct human species

Environment

Pollution on other worlds may show advanced alien life

Near-death experiences are overwhelmingly peaceful