Ancient Meteorite Impact: Catastrophic Event That Boosted Early Life on Earth

October 22, 2024
Ancient Meteorite Impact: Catastrophic Event That Boosted Early Life on Earth
  • Research led by geologist Nadja Drabon revealed that the harsh conditions following the impact lasted only a couple of decades before life rapidly recovered.

  • Despite the initial devastation, the impact introduced vital nutrients like phosphorus and iron into the oceans, fostering a bloom of microbial life.

  • Overall, this research highlights the resilience of early life on Earth, demonstrating how it flourished in the wake of catastrophic events.

  • It took years to decades for the dust to settle and for the atmosphere to cool enough for water vapor to return to the oceans.

  • The impact triggered a tsunami that disrupted ocean environments, transported debris inland, and caused the ocean's surface to boil off.

  • Approximately 3.26 billion years ago, a massive meteorite impact, known as the 'S2' event, struck Earth, creating a crater 500 kilometers wide and generating extreme heat that boiled the oceans.

  • This meteorite was significantly larger than the one that caused the extinction of the dinosaurs, measuring between 40 to 60 kilometers in diameter.

  • The resulting environmental changes included a thick dust cloud that darkened the sky, halting photosynthetic activity and raising air temperatures by up to 100°C.

  • Bacterial life, particularly iron-utilizing bacteria, rebounded quickly in the aftermath, indicating a shift in the microbial community.

  • The findings suggest that major impacts acted as a form of 'fertilizer,' distributing essential elements across the planet and supporting the survival of simple organisms.

  • Before the S2 impact, Earth was largely a water world with minimal life, primarily consisting of single-celled microbes and lacking essential nutrients.

  • The study, published in the Proceedings of the National Academy of Sciences, analyzed ancient rocks in the Barberton Greenstone Belt in South Africa, revealing evidence of life’s recovery post-impact.

Summary based on 6 sources


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