I think we and our closest relatives are the weird ones. If I remember right, most species of animal can reproduce until they die, and many die after reproducing. We kinda complicated things not just by looking after our children but also their children too.
Ok where does the mass come from? It has to consume something.
It gets all its mass from eating during it caterpillar stage. It loses its digestive system during metamorphosis.
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I think we and our closest relatives are the weird ones. If I remember right, most species of animal can reproduce until they die, and many die after reproducing. We kinda complicated things not just by looking after our children but also their children too.
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Energy is from fat stores created while a caterpillar.