Hermione Cockburn visits the London home of David Attenborough to view his private fossil collection and find out why fossils have held such a special place in his heart since his childhood.
The fossil detective team also track down evidence of the capital's ancient past, a lost world where hippos were common. They take a trip to Kew Gardens to see living fossils - plants which existed in prehistoric times and still thrive today.
A religion is a belief system with rituals. The missionary kopimistsamfundet is a religious group centered in Sweden who believe that copying and the sharing of information is the best and most beautiful that is. To have your information copied is a token of appreciation, that someone think you have done something good.