Nuclear

In the 1970s, the USSR used nuclear devices to try to send water from Siberia's rivers flowing south, instead of its natural route north.

The Doomsday Clock depicts how close humanity is to armageddon – but where did it come from, how do you read its time, and what can we learn from it?

The fear of nuclear war forced nations to come together to stop the spread of atomic weapons. Could a similar idea curb the use of fossil fuels?

Nuclear waste remains toxic for thousands of years. How do you build a storage facility that will keep it safely buried for millennia?

Astronauts living on the Moon will need lots of power – but they can't take fuel supplies with them. A new generation of miniature nuclear reactors could be the answer.

In the years after World War Two, neutral Sweden embarked on an ambitious plan – build its own atomic bomb.

The atomic bomb tests at Bikini Atoll in 1946 were too dangerous for conventional aircraft to observe. Pioneering remote-controlled drones, however, were a perfect match.

Since the 1990s, a network of sensors has listened for unauthorised nuclear detonations. It has had unanticipated upsides for science – such as identifying a pod of pygmy blue whales.