BBC

The highly threatened subspecies has been brought back to a reserve in Niger after a 50-year absence.

A spectacular sight lights up the sky as Venus and the moon rise together

The 1954 letter about religion is expected to fetch up to $1.5 million at auction in New York.

A launch is delayed due to mouldy food bars, meaning the worms could be a day too old for research.

It was discovered off the Essex coast after an unusually low tide exposed it for about half an hour.

A shark that uses its tail to stun prey and a ray half the length of a bus are on the list of 50 species.

As Poland hosts COP24 in nearby Katowice, David Shukman journeys into the depths of a working mine.

Scientists have rebuilt a terraced house inside a laboratory to help make UK homes energy-efficient.

A nationally important terminal on the Norfolk coast is to be protected by a new "sandscape".

Nasa's Osiris-Rex spacecraft moves alongside the 500m-wide rock from which it hopes to grab a sample.

Laser labs sense gravitational waves from a black hole collision at least five billion light-years away.

Three astronauts from Russia, Canada and the US left from Kazakhstan on Monday morning.

President Trump's actions are restricting global efforts to cut carbon, a study suggests.

Jordi Casamitjana wants to have ethical veganism recognised as a philosophical belief, in a landmark legal action.

Almost 80% of Poland's electricity is generated by coal. Patryk Bialas says it's time that changed.

The most significant conference on climate change since the 2015 Paris agreement opens in Poland.

Chile has banned stores from handing out free plastic bags to shoppers and it is a headache for some.

The squirrel, named Horatio, was acting "really confused" when found by the side of the road.

As representatives gather in Poland for talks on climate change, we look at how hot the world has got and what can we can all do to tackle global warming.

The UK's herbaria are great scientific collections that must be safeguarded for the future, say scientists.