Very ancient, before modern humans

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Synonym of giant

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An organ in most animals that pumps blood around the body

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Very scary

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The length of a circle or sphere

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Animals open and shut these to eat, (inside of our mouth).

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A general word to describe something as very old

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Where I food goes to be broken down for our body to digest

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To change, build, grow into something.

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When all of a species die out forever

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One thing or situation that is different to the rest

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