The remains of a Viking have been rediscovered after over a century missing - and it turns out the Viking in question was buried wearing a pair of fancy long trousers

Bats have an internal sense of the speed of sound that they use to calculate the distance to perches or prey with echolocation, and it seems to be something they don't have to learn

The Ingenuity helicopter has made its fourth flight on Mars, the furthest and fastest it's travelled so far - and its mission has been extended to allow more tests