The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
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A group of kittens is called a "kindle".
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Only 3% of bird species have penises.
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Moths are unable to fly during an earthquake.
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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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