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And TM may have brought these elements to Earth as essential ingredients for life. To test this, scientists study chemical models to look at the microbes in the air, right, and compare them to rocks on Earth. And during early solar system development, Mercury, Venus, and Earth, they've changed a lot of dust and gas by using an activation and condensation during the first three million years. And the process pretty much stopped after that because the rocky planets used up much of their free matter from the solar system to refill. In planets, near the Sun, we're then depleted of volatile elements compared to those planets further away. Just drop it.