Might our universe – as vast as it is – be simply one of many? We look at the growing evidence that there’s more than one cosmos out there

A mosaic image of Enceladus created from data ...

We’ve had a few false alarms before – including fossilised microbes and signs of carbon dioxide production in Martian rocks – but NASA has now cautiously suggested it’s found signs that life once exis

The arms race between antibiotics and bacteria

Fossilised dinosaur prints, volcanic craters, ice-carved corries – there are places in Britain where the landscape is a portal to the past. Hanna Lindon takes a stroll through 4 billion years of British history

Can we really bring back long-extinct animals, or are scientists just making close copies?