Ants have tiny magnetic compasses in their antennae which help them navigate.
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Urechis unicinctus is a species of marine spoon worm that is widely referred to as the ‘penis fish’.
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In 2011, a male tiger in India adopted a litter of orphaned cubs, taking on the role of ‘mother’. Wildlife officials say such behavior had never been observed before.
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The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
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Sheep, goats, octopuses, and toads have rectangular pupils.
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