Earth now and with a magma ocean

burn baby burn

Earth could have been a scorching, Venus-like world save for this one thing

Tobias Stierli / NCCR PlanetS

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Earth formed 4.5 billion years ago, but it looked nothing like it did today.

Instead, it was a boiling hot, inhospitable world, pelted with incoming space rocks that rained down on the planet.

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At some point in this early chaos, a Mars-sized rock crashed into Earth. The impact may have created the Moon, but it also transformed Earth's entire surface into a molten magma ocean.