If you watch the film The Martian, you'll see Hollywood explosions and special effects galore, but you'll also see some serious science.
Actor Matt Damon, who plays stranded astronaut Mark Watney, must calculate his way through food shortages, Martian road trips and other misadventures as he fights to find a way off the Red Planet.
Numbers are a matter of life and death for Damon's astronaut, and in this movie they're not pulled from thin air.
"If you care to double-check the results from what you see in the film, then you'll find out it's accurate," says
