On the hunt for an eggshell belonging to one of the largest animals to ever roam the Earth, Andy travels back 95 million years.

On his prehistoric adventure Andy travels back 30 million years, heading to Mongolia to meet a paraceratherium. This giant mammal is five times the size of a rhinoceros.

Having travelled 30,000 years back in time, Andy joins a herd of woolly mammoths and, on his adventure, comes across one of his own ancient ancestors.

Andy travels back 100 million years to meet the carnivorous spinosaurus, bigger than a T-Rex. On his trip, he takes a swim in a prehistoric river and rides an ouranosaurus.

Andy heads back 160 million years, looking for a feather from the tiny epidexipteryx. He finds himself stranded up a tree after an encounter with a hungry carnivore.

On his prehistoric adventure, Andy travels back 50 million years to find a tiny leptictidium, a furry mammal that used to bounce around the European forests.