2/3 Tessa asks if the past century has pushed wildlife beyond the point of no return.
6/6 Clare Balding visits the Orkneys and walks the spectacular coast path on the island of Hoy
Quentin Cooper joins students on an Open University course studying the environment.
1/6 The spray has become a highly versatile tool.
1/3 Tessa looks at the ingenious strategies that plants and animals have evolved to survive.
5/6 Clare Balding explores an area of the Norfolk Broads, walking along the river Ant.
Dr Mark Lythgoe attempts to find out what constitutes intuition and when we should use it.
Quentin Cooper joins a group of Open University geology students on a field trip.
2/2 Sue Broom explores whether people are prepared to eat meat from cloned animals.
4/6 Clare Balding walks on the Cornish coast path between Bosigran and Gurnard's Head.
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