The comet dubbed 3I/ATLAS, a rare extrasolar intruder, continues to barrel through the Solar System, attracting interest and speculation from astronomers and space scientists worldwide. Harvard astron

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

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

The Saudi Crown Prince wanted to reinvent urban living with his “linear city” stretching 170km across the desert. But with construction on The Line having already stalled, many are asking if the project was ever remotely feasible.

Projecting our consciousness into other bodies and walking on alien worlds might not be such a far-flung concept

Measuring time using the Earth’s rotation was always an imprecise business, so now we do it using the ‘tick’ of an atom