Urechis unicinctus is a species of marine spoon worm that is widely referred to as the ‘penis fish’.
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The elephant shrew’s closest relative isn’t a shrew — it’s actually an elephant
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The elephant brain weighs about 6,000g.
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Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
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Rattlesnake mating sessions have been known to last more than 22 hours.
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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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