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Asteroids and planetesimals regularly bombarded Earth between about 4.6 billion and 3.5 billion years ago, during the Hadean ...

Debris is still raining down on Earth more than 100 million years after the giant cosmic explosion that created it. A study ...

“Using a bombardment history model to infer the cumulative effects of recurring impacts, we estimate that the upper 5-mile (8-kilometer) shell of the Earth’s crust likely was highly permeable 4.3 ...

Our Earth is structured sort of like an onion – it’s one layer after another. Starting from the top down, there’s the crust, which includes the surface you walk on; then farther down, the mantle, ...

When the first Earth Day was held in 1970, geologists were still putting the finishing touches on plate tectonics, the model that explains how the Earth's surface takes shape. More than 40 years later ...

Earth is the only planet known to support life. Learn about what Earth is made of and where it came from. When you purchase through links on our site, we may earn an affiliate commission. Here’s how ...