Who says you need a body of water to row? The rowing machine has long been a favourite of athletes, gym-goers and at home workout enthusiasts. And for many, it’s an essential piece of equipment.

In this http://www.WatchMojo.com Presents video, we get the highlights from the hardest and craziest rowing challenge in the world: the Red Bull XRow 2011.

These are the sports that get your heart pumping, your muscles aching, and your sweat dripping. From rowing to waterpolo, and soccer, these sports may be rewarding, but dang! They’re hard! WatchMojo counts down the Top 10 Most Physically Challenging Sports.

Stephen Hawking is considered to be one of the smartest people ever, one of the most gifted minds in history. So, it’s not surprising that these facts on Stephen Hawking, his theories, his beliefs and his achievements will blow your mind! Everything from the fact that Hawking believes in aliens, how he’s never won a Nobel Prize or even that he was a mediocre student is covered here in this brief history of time – err, of Stephen Hawking!