Sixty-six million years ago, an asteroid wiped out the dinosaurs in a fiery global catastrophe. But we know little about how their successors, the mammals, recovered and took over the world. Now, hidden inside ordinary-looking rocks, an astonishing trove of fossils reveals a dramatic new picture of how rat-sized creatures ballooned in size and began to evolve into the vast array of species.
The world of the armoured creature is equally fascinating and bizarre. Galapagos giant tortoises solve the problem of making love in a suit of armour; a heated sea turtle orgy leaves females in mortal danger and we witness the explosive arrival of a baby pig-nosed turtle. Giant salt-water crocodiles crowd a flooded river-run to fish for mullet and a caiman leads her brood in a touching trek to a communal crèche.
The museum's dinosaur experts Susie Maidment and Paul Barrett follow up an exciting tip-off about some possible dino footprints in Wales. Meanwhile, the world's most famous dinosaur - Dippy the Diplodocus - is on a road trip around the country and needs an up-close inspection to make sure it's safe.