The US government designates a huge area in Alaska as a 'critical habitat' for polar bears, raising the hopes of environmentalists.

Gardens are able to sustain a greater number of bumblebee nests than farmed land, a study involving genetic analysis and modelling suggests.

The nearest spiral galaxy to the Milky Way - Andromeda - was born when two smaller galaxies collided, say astronomers.

A new research paper by experts in Lyme Regis suggests that local ammonite fossils have visible bite marks.