Could a Massive Collision Produce a Subsurface Ocean on Pluto?

Pluto and Charon have captured our hearts and imaginations. But how did these adorably strange worlds form, and what consequences could that have on what we see now? Astrophysicist Amy Barr Mlinar stopped by to chat with us about catastrophic collisions, subsurface oceans, and Pluto’s lack of craters.

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