An assortment of marine life rarely seen before.
(03:02)Megalodon was the biggest predator ever to swim the oceans who ruled the seas for 20 million years.
(01:06)A captivating documentary looks for the truth behind the compelling Mayan myth - that the world will end in 2012.
(01:18)The island is so small it has never had human habitation, is probably the most pristine island.
(03:00)Follow Ewan McGregor and best friend Charley Boorman as they prepare to bike from the top of Scotland to the tip of Africa.
(02:30)Meet the feathered 'Terror Birds'.
(02:22)