Our body is a true time machine. It is a mirror of the history of the living world. If an engineer today had to fabricate the ideal human, he would most likely not design us the way we are currently made. He would go to the most logical, the most efficient, the most rational; and when you look closely, this is not always what characterizes us.
Some of the biggest predators to walk the earth face a constant battle - their prey is heavily armoured, indigestible and sometimes even poisonous. What makes this struggle more remarkable is that these predators do not prey on animals - but on plants.
Finding somewhere to keep safe is one of the biggest challenges an animal faces. But some animals don't have to find a safe place - they build one. Chris reveals some of the best building animals in the world - a group that is incredibly varied. Accomplished animal architects include everything from beavers to bees and prairie dogs to bowerbirds. They don't only build homes, however - they also make structures to raise their young, store food, catch prey and impress mates. But what can be learnt from their building brilliance?
On the southern coast of Africa lies Algoa Bay--a protected refuge for the continent's only penguin species. Join them in their quest for survival as they brave unforgiving elements to build an unlikely marine community.