1. Together with woolly mammoths and sabre-toothed tigers, our ancestors roamed what are now submarine continental shelves.

2. The sabre-toothed monsters are unimpressed.

3. Other remains suggest they lived alongside predators including sabre-toothed cats.

4. Next we visit a colony of sabre-toothed monsters that used to attack ships. At least those were the tales spun by early mariners who first sighted walrus.

5. But scientists have now discovered a sabre-toothed beast that feasted on leaves and stems some 260 million years ago in Brazil - and looked more like a tortoise than a feared predator.

6. It came to rest with corpses of slow woolly mammoths frozen deep inside, it lay on the bones of sabre-toothed tigers.

7. He was found on the beach of one of the Pao Islands by a female sabre-toothed Jaguar.

8. It allowed you to protect your helpless offspring from sabre-toothed tigers.