Science Jokes

At a press conference the Brunettes announce they are going to make a trip to the Moon. The Redheads speak up "That's been done before, we're going to go to Mars". The Blondes speak up "That's nothing, we're going to be the first people to go to the Sun". One of the reporters says "Don't you idiots know that you'll burn up?" The Blondes say "NO WE WON'T; WE'RE GOING TO GO AT NIGHT!"