Urban agriculture plays a much more extensive role in global food security than previously estimated, a study using satellite data suggests.

The brain has a weak spot for Alzheimer's disease and schizophrenia, according to experts who have pinpointed the region using scans.

Scientists use gravity data to produce what they say is the most accurate space view yet of global ocean currents and the speed at which they move.

Archaeologists in Denmark have uncovered an incredibly rare find: a stone age axe held within its wooden handle.