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flag NASA discovers seven new "dark comets," potentially key to understanding life's origins.

flag NASA has found seven new "dark comets," doubling the known count to 14. flag These objects look like asteroids but behave like comets, with two distinct groups: larger ones with eccentric orbits in the outer solar system and smaller ones with nearly circular orbits near the inner planets. flag The discovery, published in the Proceedings of the National Academy of Sciences, suggests dark comets might have delivered materials essential for life on Earth.

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