Forskare i Sydkorea har hittat stromatoliter inuti nedslagskratern Hapcheon, vilket tyder på att asteroidnedslag skapade förhållanden som gynnade tidigt syreproducerande liv.
Ett team från Korea Institute of Geoscience and Mineral Resources identifierade de skiktade strukturerna i den nordvästra delen av kratern. Varje struktur mätte 10 till 20 centimeter i diameter. Platsen är den enda bekräftade asteroidnedslagskratern på Koreahalvön.
New computer models indicate that ancient asteroid strikes created vast underground hydrothermal systems on early Earth. These environments could have supported the chemical processes needed for life to begin. Researchers from the Southwest Research Institute led the study.
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Japanese researchers announced the discovery of asteroid traces in Hokkaido. This is the first confirmation of such traces in Japan. The findings may relate to the extinction of dinosaurs in the Cretaceous period.
Researchers have uncovered evidence of a powerful solar proton event that struck Earth around 1200 ce by analyzing carbon-14 spikes in ancient Japanese trees and cross-referencing medieval records of red auroras.
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NASA’s Perseverance rover has identified complex macromolecular carbon on the surface of a rock in Jezero Crater. The detection at the Bright Angel outcrop represents the shallowest such finding on Mars to date.