How soils changed life on Earth

For the first 4 billion years of Earth's existence, its continents were dusty, barren and rocky landscapes similar to the surface of Mars. But, around 500 million years ago, this all changed.

NASA has simulated a tiny part of the moon here on Earth

Before going to the moon, the Apollo astronauts trained at various sites on Earth that best approximated the lunar surface, such as the volcanic regions Iceland, Hawaii and the U.S. Southwest. To help prepare for upcoming ...

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