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Every species has a secret weapon, a primal instinct that defines them - and it's not always as obvious as it seems. These are stories of the planet's incredible killers, extraordinary lovers, amazing heroes, soldiers and savages.
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Episode 1
41 mins
A look at the tactics, trials, and tribulations of a vast array of different species in their fight to further their bloodlines. From the capybara mother who chooses to lose one baby to save seven, to the elephants standing vigil over an unknown calf, this is a journey into what really makes animal parents behave as they do.





