The second in Sonic's racing series takes the hedgehog into never-before seen worlds with edge-of-your-seat racing intensity and all-new gravity controlling moves. In Sonic Riders: Zero Gravity, Sonic ...

If there's one thing everybody knows about space, it's that there's no gravity once you leave the Earth's atmosphere. We all know that don't we? It's actually not true — and an attempt at a massive ...

NASA shows how space takes a toll on men and women differently. — -- With an upcoming mission to Mars, NASA is studying the ways that living in space affects both men and women. In a study ...