Where is the solar system’s water?

Mars once had vast oceans on its surface. Then its magnetic field weakened, its atmosphere thinned, and its water vanished. But the numbers don’t add up. For the Red Planet to have transformed from a

Scientists distinguish between weight and mass, which may seem pedantic until you see what happens on a world where gravity is radically different to Earth’s

Ten years ago, Pluto emerged from the gloom at the Solar System’s ragged edge – and a new world came in from the cold. Five billion kilometres (3 billion miles) from Earth, on 14 July 2015, NASA’s pia

The best discoveries, inventions and surprises

Take a deep dive into some of the world’s most curious submerged sites

Explore the secret landscape concealed by the ice of this Arctic island nation