Many creatures will mimic more dangerous animals in order to escape being eaten, but why do some of nature's worst impersonators survive?

A Nasa spacecraft has found further tantalising evidence for the existence of water ice at Mercury's poles.

Whales can focus with a beam of sound - pinpointing their target with a narrow stream of clicks to study it in detail, according to scientists.

Royal Dutch Shell signs its first-ever production sharing contract for shale gas in China with China National Petroleum Corporation.

A growing trend for pet owners to bag up dog mess and leave it on beaches threatens bathers' safety and the health of wildlife, a report suggests.

One of five cuckoos that scientists had tagged with a satellite tracking device is "missing in action", according to the British Trust for Ornithology.

Hollywood director James Cameron awaits a clear stretch of weather to begin his dive to the deepest place in the ocean.

Restrictions on hundreds of Welsh and Cumbrian sheep farms dating back to the Chernobyl nuclear disaster are lifted - 26 years on.