Siamese fighting fish take gulps of air from above water so they can continue to clash, say scientists.

The government's Energy Bill will be published alongside proposals to pay businesses for cutting electricity use.

Astronomers spot the second-largest black hole ever seen, but in a tiny galaxy just a quarter the size of the Milky Way.

Artificial light from the Grangemouth oil refinery and Longannet power station help migrating birds find food in winter, according to research.

BP is temporarily banned from new US contracts due to a "lack of business integrity" over the Gulf of Mexico disaster, the US environment agency says.

A 25-strong team of conservation scientists, pilots and engineers is gearing up to resume the largest animal eradication effort ever undertaken.

Energy minister Ed Davey publishes his much-trailed Energy Bill, setting out the roadmap for the UK's switch to "a low-carbon economy".

Commercial hunting will be banned in Botswana as wildlife species face a sharp decline in the southern African nation, officials say.