The Winchcombe meteorite contains amino acids that potentially led to life on Earth.
— already considered rare — its extraterrestrial organic matter sets it apart. Because the Winchcombe fragments were collected so soon after they fell to Earth, there was almost no chance for terrestrial contamination. Therefore, the organic matter found inside the meteorite is believed to be as it was when the asteroid it came from was hurtling through space.
And there's another characteristic that makes the Winchcombe meteorite a time capsule: evidence of liquid water from the distant past. Among the organic matter the scientists discovered was organic matter that can be dissolved — and probably had been dissolved — in water. Parts of the meteorite were found to be more chemically altered by water than others. Scientists think water from the space rock's parentset off chemical reactions that created the meteorite's amino acids, some of which are rare on Earth. Those same types of amino acids eventually formed proteins, from which primitive life-forms would emerge billions of years ago.
What makes the Winchcombe meteorite even more mind-blowing is that its structure should have made it too weak to make it to the surface, the team said.
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