First, there’s no air on Mars. If you were dropped on the surface of Mars, the view would be spectacular. Then you’d quickly pass out, and expire a couple minutes later from a lack of oxygen. There’s almost no air pressure, and temperatures are incredibly cold. Did I mention the constant radiation streaming from space? You also might want to note that the soil is toxic. There’s a long list of these types of problems. The days are a little longer; you’ll be sleepy.