Slow risers are perfect to go to Mars
People with abnormally slow body clocks will be perfect for travelling to Mars.
Early risers could be prohibited from going to Mars because scientists found they have the wrong internal clock for life on the Red Planet.
Professor Andrew Loudon, University of Manchester told The Telegraph: "If we ever do get to the Red Planet, I suspect we will be faced with body clock problems. Those people with abnormally slow body clocks would be best suited to living there."