That strengthens the case for such cross-species organ swaps

It has stirred controversy about how the discipline should work

New paints promise to get rid of heat without using energy

Composite tiles, fabrics and foams may bring effective shielding from orbital debris

Blueness may be less important than brightness

No serious harm was done this time. But what if such agents escaped?

It will study dark matter, dark energy and far-distant planets

Wearable machines that assist just one part of the body are proving surprisingly useful

It may be nothing. But it may be something big

Warmed up and ready, player one

How a glacial avalanche visits devastation

Reports suggest some are being used to launch drones

Their odd behaviour seems to be a relic of the time of the glaciers

The $100bn facility aims to support up to 30 rocket launches a day

New theories and experiments should shine light on string theory

The latest results are promising, but not yet definitive

Oliver Morton, a senior editor, examines how contrails affect the climate

Stones in dinosaur stomachs may help understanding of avian evolution

The sound of giant tractors may replace dynamite

Make it stick