Astronomers are now regularly detecting planets thousands of light years from Earth – but have we missed one in our own Solar System?

Amazing answers to your curious questions

© HEADER DRAWINGS BY MICHAEL HADDAD/HEART Leaves Byung-Chul ...

Although it’s by no means certain, scientists are slowly accumulating evidence that life once existed on the Red Planet

From an Academy-honoured screenwriter comes a mind-bending thriller – a bold vision of quantum AI and time travel, and a meditation on Fermi’s Paradox

We humans are always wondering whether we’re alone in the Universe. But what if we are one of a long line of species that were around long before our planet even existed? This intriguing idea, that li