We've all heard size doesn't matter, but never has it been so true than in the animal kingdom. This new series looks at some of the world's smallest creatures, and their amazing survival techniques. In this episode, we get a closer look at the grasshopper mouse in North America's Sonoran Desert. An awful cute little fella, but don't be deceived, this little dude is well able to hold his own. He is capable of disarming scorpions and centipedes TWICE it's size. It's also stealth enough to get away from rattlesnakes and tarantulas. So basically, Stuart Little has got nothing on this guy. Oh and the programme is also narrated by Stephen Fry! Sorry, should really have opened with that, shouldn't I?