It has been the subject of movies, books, scientific discussion, and even music for longer than living memory. But has there ever been life on Mars? If so, where did it thrive? A new theory says it could have existed in vast underground lakes below the surface.

Astronomers from the University of Montreal recently took a closer look at the ultra-large exoplanet WASP-107b and found that these so-called 'super-puff' planets can get even weirder than they imagined.