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University of Cambridge study challenges theory of comets seeding life on Earth
New computer simulations published in Scientific Reports suggest that the long-standing theory of comets delivering the building blocks of life to Earth may be incorrect. For decades, scientists have hypothesized that icy comets acted as a delivery mechanism, transporting essential organic molecules and water to the early planet.
Researchers from the University of Cambridge, led by Dr. Richard Anslow, conducted 100,000 simulations of the early solar system to test this hypothesis. The results indicate that most cometary impacts were too violent to preserve fragile organic compounds. The high entry speeds and steep angles of approach often caused these molecules to vaporize or be destroyed by extreme heat and pressure upon impact.
The study found that in 54 percent of the simulations, no successful delivery occurred. While a tiny minority of scenarios resulted in up to three successful impacts, the researchers concluded that such events would be a “one-off fluke” rather than a steady, reliable supply of raw materials. This challenges the concept of a consistent cometary rain of life-seeding chemicals during Earth's formative years.
Entities
Earth · Institute of Astronomy · Mars · Richard Anslow · Scientific Reports · University of Cambridge
Claims
What the coverage asserts, and how many sources carry each claim.
- [● 3 SOURCES] Computer simulations suggest comets were unlikely to have delivered the organic molecules needed to start life on Earth. futurism.com · www.newindianexpress.com
- [● 3 SOURCES] Fragile organic molecules would likely be destroyed or vaporized by the speed and angle of cometary impacts. futurism.com · www.newindianexpress.com
- [○ 1 SOURCE] Comet impacts on Earth declined rapidly during the planet's first 500 million years. www.newindianexpress.com
- [○ 1 SOURCE] The study specifically focused on the prebiotic molecule hydrogen cyanide (HCN). www.newindianexpress.com
- [○ 1 SOURCE] Mars may have had better conditions for cometary delivery due to its smaller size and thinner atmosphere. www.newindianexpress.com