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�� Lesson 1 Finding Fossil man
�� Lesson 2 Spare that spider
�� Lesson 3 Matterhorn man
�� Lesson 4 Seeing hands
�� Lesson 5 Youth
�� Lesson 6 The sporting spirit
�� Lesson 7 Bats
�� Lesson 8 Trading standards
�� Lesson 9 Royal espionage
�� *Lesson 10 Silicon valley
�� Lesson 11 How to grow old
�� Lesson 12 Banks and their customers
�� Lesson 13 The search for oil
�� Lesson 14 The Butterfly Effect
�� Lesson 15 Secrecy in industry
�� Lesson 16 The modern city
�� Lesson 17 A man-made disease
�� Lesson 18 Porpoises
�� Lesson 19 The stuff of dreams
�� Lesson 20 Snake poison
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