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Bennu is near-Earth carbonaceous asteroid about the size of a small mountain in the Apollo group.
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It is carbon-rich asteroid and believed to be the type of asteroids that may have chemical building blocks of life, along with lots of water.
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So, analysis of returned sample from it could help to reveal key insights about early solar system and the origin of life on Earth.
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It can strike earth and cause massive destruction. According to experts, it has a only a one in 2,700 chances of hitting.
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This event will occur in year 2135
