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And one of the most popular theories, how White's got its kickstart on Earth, was that it was seeded from outer space, and this means that prebiotic, or the building blocks of life, were carried here by asteroids, meteorites, or even comets, etc., could be other ways it was brought here as well. And these compounds have been found in rocks from space that crashed into Earth, but the science wasn't conclusive, largely because of the possibility of contamination in our environment. Once they enter our atmosphere and start coming through the atmosphere and finally slam it into the ground, they're being inundated by all kinds of things in the atmosphere, and finally when they hit the Earth, there's all kinds of biological things they're coming in contact there with as well.