This driving tour moves through a layered city road in China, where lanes split beneath a pedestrian bridge and the skyline appears in the distance. A yellow taxi, blue direction signs, curved roads, ...

Most stars in the cosmos are small, cool red dwarfs, yet the only intelligent life we know orbits a relatively rare yellow dwarf under a blue sky. That mismatch is at the heart of the “red sky paradox ...

Holidaymakers have one major thing in common with scientists who are on the hunt for alien life: their plans are often thwarted by clouds. The clouds on alien worlds are such a long-standing issue – ...