BBC Earth

Clip 3

Preview

Steve takes a look at the incredible world of reptiles and discovers what makes them cold-blooded killers.

First up he looks at their weapons. From the chameleon's spring-loaded turbo tongue to the alligator snapping turtle's lethal jaws. Next Steve tests out the most powerful bites on the planet when he encounters reptilian giants – the crocodiles. Finally Steve investigates the super senses of snakes before heading to the remote island of Komodo to meet the largest lizard alive.