What If Earth Became Tidally Locked?

What If Earth Became Tidally Locked?

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There’s a reason we only ever see one side of the Moon. It’s tidally locked to the Earth, presenting only one side to us as it orbits around the planet. Tidal locking is a fate that befalls lots of planetary bodies, and it can wreak havoc on the surface.

Why does tidal locking happen? And more importantly, why hasn’t Earth become a tidally locked planet? And are we doomed to go that way eventually?