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Andy travels 15,000 years into the past to meet a giant prehistoric sloth. On the way, he is stalked by a sabre-toothed cat and rides a colossal Columbian mammoth.
Andy and his time-travelling clock head 160 million years into the past in search of a feather belonging to a tiny prehistoric dinosaur called the epidexipteryx. But an encounter with a hungry meat-eating dinosaur leaves Andy stranded in the tree tops.
Andy plunges into an underwater prehistoric adventure, 150 million years back in time, as he searches for a swimming reptile that's the size of an elephant! But after being chased by a scary shark, he finds himself lost at sea.