They might even have liquid oceans at that po int. Actually, in space your heart would beat slower because it would have to work less, not more. On Earth, your heart has to work against gravity pulling your blood to your feet. In space, since there is no gravity, your heart wouldn't have to work as hard. Because it wouldn't have to work as hard, your heart would beat more slowly and eventually get very weak.
People blush when blood rushes to just under their skin.
Since the blood is red, it causes the face to look red also. This usually happens when people are embarassed. It happens more often to some people than to others. Mars is the most likely planet humans will try to colonize first since it is more similar to Earth than any of the other planets. NASA plans to send a manned mission to the Red Planet by the year 2020.