You've probably seen a butterfly or two flapping their cutie-pie wings this summer...but guess what? THEY WEREN'T ALWAYS LIKE THAT. Somehow, these creatures started out as a thiccc caterpillar, turned into a goo-ball and came out looking hunky and ready to fly their little hearts out. But how does such a beautiful creature come from mushy gloop? And why? 

To find out, we interviewed Dr. Jens Rolf, a scientist from the far away land of Berlin who studies the wild world of metamorphosis.

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