Christopher Columbus was an European explorer and trader who by coincidence discovered America in the 15th Century. Check your knowledge and build up your Dreevoo profile.
Ig Nobel Prizes are given to serious scientists where result of research is to make people laugh, then make them think. Now they have just announced winners for 2012.
Rover Curiosity is a really popular topic all around the world and I was just given a question what would been happen if an astronaut would take off the space helmet while being exposed on Mars?
