Vår fantastiska planet

3 Människan

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Intelligen­s........................................................80

Våra fysiska gränser.................................... 84

Eld på gott och ont....................................... 86

Altruism ........................................................... 88

Electricit­et ...................................................... 92 Antibiotik­a.......................................................94

Människans språk ........................................ 96

Klyvning av atomen...................................100

Tid ....................................................................102 Pengar............................................................107

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