Venom, the deadliest natural weapon employed in the animal kingdom, has independently evolved in creatures as diverse as jellyfish, insects, snakes and even mammals.
S1 E8: Venom
S1 E9: Size
S1 E10: Speed
S1 E11: Shape
S1 E1: Eyes
S1 E2: Skin
S1 E3: Guts
S1 E4: Jaws
S1 E5: Communication
A look at communication as a key tool for survival, from simple bacteria cooperating to take down creatures a million times their size, to mankind's complex systems of interaction.
S1 E6: Flight
How did flying creatures come to be? From the first vertebrates to take a flight to the creatures that have conquered the sky, examine the animals which have evolved to fly.
S1 E7: Sex
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