The EU agrees what it calls "the world's most ambitious" deal to cut greenhouse gas emissions by 40% by 2030, overcoming deep divisions among members.

The UK's chief scientist says the oceans face a serious and growing risk from man-made carbon emissions.

Campaigners start legal action to prevent the government from capturing a family of wild beavers.

Surgeons in Australia say they have performed the first heart transplant using a "dead heart".

The European Space Agency releases a short scifi movie to promote its audacious bid to land on a comet next month.