What's the likelihood that we'll ever find extraterrestrial life? Many scientists would argue that the chances are slim. When you get down to basic essentials, you need water and moderate temperatures for life to take off. And it's unlikely that these conditions exist beyond our planet. That's the basic argument. But now Dr Alan Tunnacliffe, an award-winning researcher at Cambridge University's Institute of Biotechnology, steps in and tells you about rotifers, tiny animals that can withstand extreme temperatures and survive in almost waterless conditions. It's an intriguing five minutes of video that will get you thinking about the possibilities.