S4 Ep11: Why Is The Very Hungry Caterpillar So Dang Hungry?

Aired: 7/11/2017 | 0:04:42 | Episode
Because it's hoarding protein. Not just for itself, but for the butterfly it will become and every egg that butterfly will lay. And it's about to lose its mouth... as it wriggles out of its skin during metamorphosis.

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