One of the UK's most threatened birds - the bittern - is returning to England and Wales, according to conservationists.

New onshore wind farms will be excluded from a UK government subsidy scheme from 1 April 2016 - a year earlier than expected.

Pope Francis issues an encyclical on the environment in which he says fossil fuels should be "progressively replaced without delay".

Neuroscientists find that artificially stimulating a positive memory can cause mice to snap out of depression-like behaviour.

Policymakers have a "once in a generation" opportunity to reform the insurance sector to help those at risk from climate change impacts, say researchers.

DNA tests show an ancient skeleton known as Kennewick Man is related to modern Native Americans - reigniting a debate over whether his bones should be returned to local tribes and reburied.

Most illegally poached African elephant ivory can be traced back to just two areas of Africa, research shows.