BY SAM BURNS EVER WIDENING CIRCLES

We’ve gone to the moon, harnessed the power of the sun, decoded human DNA, and even learned about the lives of creatures that walked the earth long before us. But there’s one peculiar mystery scientists just can’t seem to figure out: freshwater eels. More specifically, how do they create new ones?

From Aristotle to Sigmund Freud, many of the greatest minds of recorded history have pondered the reproductive habits of—of all things—eels. Why should we care about how eels reproduce? Well, it’s a mystery that points to a fundamental truth about our planet and, well, us: we don’t know everything!

To catch us up on the whole fascinating story and find out where we’re at in uncovering this great wonder of the world, here’s TED-Ed!

Via: TED-Ed 1

Freshwater eels travel enormous distances, live in habitats that span the Bermuda Triangle to the rivers of Europe, and they have extraordinarily complex lives. If an eel can be this complicated, it’s an important reminder that we still only understand a tiny fraction of our planet’s extraordinary complexity!

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