A British Airways insider says the industry deliberately fills planes with extra fuel to save costs.

Cutting the speed of ships by 20% can benefit health, protect whales and limit warming, say campaigners.

The rare hoiho becomes the first penguin to take the title, after two weeks of "memes and trash-talk".

Astronomers are observing a rare event, a transit of the planet Mercury.

A loss of snow and ice cover are the main reasons for the reduction of the Arctic's albedo effect, not soot as had been previously thought.

The most damaging tropical cyclones are three times more frequent now than they were 100 years ago.