There’s a reason the game Asteroids was so panic-inducing—giant space rocks hurtling toward Earth at 45 times the speed of a bullet are no small threat. When one of these celestial missiles strikes, the consequences can be nothing short of catastrophic. Some 66 million years ago, a massive asteroid collided with our planet. No fossils have ever been found above the impact layer, marking a clear divide in Earth’s history. The gigantic crater left behind remained hidden to science until the 1990s,

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