Did comets really start life on Earth? New study challenges long-held theory
A new study from the University of Cambridge suggests that comets may not have been the primary source of life-building chemicals on early Earth. Computer simulations indicate that high-speed impacts likely destroyed organic molecules like hydrogen cyanide upon arrival.
Why it matters
This challenges a long-standing scientific theory regarding the origins of life, potentially shifting the focus of astrobiology research.
A new study has challenged the long-standing theory that comets may have delivered the chemical ingredients needed for life to emerge on Earth, suggesting that the high-speed impacts could have destroyed most of these compounds before they had a chance to contribute to the development of life.Researchers from the University of Cambridge used 100,000 computer simulations to examine whether comets could have delivered sufficient quantities of hydrogen cyanide, an important chemical involved in the formation of life's building blocks, to early Earth.The findings suggest that successful delivery was extremely unlikely, raising questions about the role comets played in the origin of life on our planet.The study, led by Richard Anslow of the University of Cambridge, was published in the journal Scientific Reports on October 28.
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