ultricies, sapien non vulputate facilisis, purus diam tincidunt nisl, quis consectetur nibh est ornare nisl. Vivamus feugiat ultrices elit, a ultrices mauris mollis eget. Donec nulla odio, tempus vel sagittis ac, euismod quis augue. Sed venenatis tortor in mauris feugiat, eget faucibus ligula aliquet. Phasellus et sem a justo dignissim consectetur. Nullam venenatis erat id commodo porta. Integer in nibh sit amet nunc malesuada mattis. Praesent ut risus elit. Aenean pellentesque ligula eget est volutpat, nec convallis arcu dignissim. Duis nisl sapien, accumsan sed lorem nec, vulputate volutpat ante. Donec tincidunt tempus metus, id scelerisque massa convallis placerat.
Etiam lacinia aliquam odio, ut vestibulum libero porta non. Duis tincidunt pretium diam at bibendum. Suspendisse consectetur aliquam lorem at lobortis. Aenean auctor neque justo, ac vehicula risus sollicitudin eget. In tempus erat eu lectus dignissim, gravida imperdiet dolor dignissim. Mauris pulvinar suscipit purus in dictum. Curabitur quis dui nec sem ullamcorper pretium. Proin in purus in eros interdum dictum sed quis mauris. Praesent sapien sapien, ultricies in mattis sit amet, aliquet eget nulla. Nunc ante velit, pharetra eget dui eu, facilisis adipiscing risus. Donec nisi leo, convallis ut ultricies accumsan, placerat eget libero. Curabitur blandit feugiat est, ultrices porttitor enim molestie vitae. Curabitur fringilla felis et turpis tempor aliquam.
A giant meteorite boiled the oceans 3.2 billion years ago. Scientists say it was a ‘fertilizer bomb’ for life
posted by Ronalddek Viernes, 01 Noviembre 2024 01:26 Comment Linkгей порно молодые
A massive space rock, estimated to be the size of four Mount Everests, slammed into Earth more than 3 billion years ago — and the impact could have been unexpectedly beneficial for the earliest forms of life on our planet, according to new research.
Typically, when a large space rock crashes into Earth, the impacts are associated with catastrophic devastation, as in the case of the demise of the dinosaurs 66 million years ago, when a roughly 6.2-mile-wide (10-kilometer) asteroid crashed off the coast of the Yucatan Peninsula in what’s now Mexico.
But Earth was young and a very different place when the S2 meteorite, estimated to have 50 to 200 times more mass than the dinosaur extinction-triggering Chicxulub asteroid, collided with the planet 3.26 billion years ago, according to Nadja Drabon, assistant professor of Earth and planetary sciences at Harvard University. She is also lead author of a new study describing the S2 impact and what followed in its aftermath that published Monday in the journal Proceedings of the National Academy of Sciences.
“No complex life had formed yet, and only single-celled life was present in the form of bacteria and archaea,” Drabon wrote in an email. “The oceans likely contained some life, but not as much as today in part due to a lack of nutrients. Some people even describe the Archean oceans as ‘biological deserts.’ The Archean Earth was a water world with few islands sticking out. It would have been a curious sight, as the oceans were probably green in color from iron-rich deep waters.”
When the S2 meteorite hit, global chaos ensued — but the impact also stirred up ingredients that might have enriched bacterial life, Drabon said. The new findings could change the way scientists understand how Earth and its fledgling life responded to bombardment from space rocks not long after the planet formed.