20/20 The naturalist comments on the decline in collecting by children.
BBC Radio 7
19/20 The naturalist asks why the Large Blue butterfly recently died out in the UK.
18/20 Is it possible to extract the DNA from a fly trapped in amber to recreate a dinosaur?
17/20 The broadcaster recalls the importance of human eyebrows for communication.
16/20 The naturalist recalls the challenge of filming the birds of Borneo.
15/20 The naturalist examines the revelations found from following fossilised animal tracks.
14/20 Slaughtered into oblivion, the naturalist asks what lessons can be learned from the dodo.
13/20 Was the first live specimen of the primitive bony fish shown on TV really a living fossil?
12/20 The naturalist recalls finding an ammonite inside limestone, sparking his love of fossils.
11/20 Looking at why underground animals have evolved differently from those on the surface.
10/20 Musings on the New Guinea residents, who fooled early explorers with their adornments.
9/20 The naturalist recalls his first pet, a fire salamander given to him on his 8th birthday.
8/20 A 150-million-year-old feather from an animal that lived before birds had evolved.