Tag

Asteroid Impact

All articles tagged with #asteroid impact

science3 days ago•7 min saved

Ancient Stromatolites Found in Crater Hint at Hydrothermal Cradle for Life

South Korean researchers report finding 10–20 cm stromatolites beneath the Jeokjung-Chogye Basin crater, formed by a ~42,000-year-old asteroid impact, in a hydrothermal lake environment that could have supported microbial life. Mineral signatures including europium indicate hot-water conditions, with radiocarbon dating placing formation between ~23,400 and ~14,600 years ago. The discovery suggests impact craters may have provided transient habitats that contributed to early Earth oxygenation, though more research is needed and similar craters should be studied.

via ScienceAlert|

#asteroid-impact #early-earth #hydrothermal

science16 days ago•14 min saved

A front-row account of the dinosaur-ending asteroid impact

The article guides readers through a vivid timeline of the 66-million-year-old asteroid impact that ended the dinosaurs. It describes the instantaneous fireball, shock waves, and vaporized rocks, followed by megatsunamis, global fires, thick dust, and a prolonged ‘nuclear-winter’ like atmosphere that plunged Earth into darkness and freezing temperatures. Over the next year to decade, ecosystems collapse and mass extinctions unfold, with evidence from iridium-rich layers and the Chicxulub crater confirming the catastrophe. Eventually life recovers in new configurations, enabling mammals to rise in the long aftermath.

via The Conversation|

#asteroid-impact #chicxulub-crater #cretaceous-paleogene

space16 days ago•73 min saved

Dante’s Inferno May Foreshadow Asteroid Impacts, Geomythology Suggests

A medieval scholar argues that Dante’s Inferno describes a massive, space-style impact—Lucifer’s fall and the Earth’s upheaval—that reshapes the southern hemisphere, suggesting an early, geomythological glimpse of asteroid/comet impacts.

via Space|

#asteroid-impact #dantes-inferno #divine-comedy

science2 months ago•4 min saved

Ancient North Sea asteroid sparked a colossal 100-meter tsunami

Researchers confirm that the Silverpit Crater beneath the North Sea was formed by a 160-meter-wide asteroid about 43–46 million years ago, triggering a tsunami over 100 meters tall and blasting a 1.5-km-high plume of rock and water. Using advanced seismic imaging and analyses of shocked minerals, the study resolves the crater’s origin as an asteroid impact and highlights the rare preservation of an oceanic impact site.

via The Daily Galaxy|

#asteroid-impact #nature-communications #science

science2 months ago•3 min saved

Ancient North Sea asteroid crash unleashed a 100m tsunami, study says

New seismic data and rock fragments confirm the Silverpit feature beneath the southern North Sea is an impact crater formed by a ~160-meter asteroid striking at a shallow angle about 43–46 million years ago, which generated a tsunami over 100 meters high. The findings resolve a long-running debate and place Silverpit among Earth's rare preserved submerged craters, alongside Chicxulub and Nadir.

via ScienceDaily|

#asteroid-impact #north-sea #science

science4 months ago•4 min saved

New Study Reframes the End of Dinosaurs: Thriving, Not Fading

A Science study finds dinosaurs were flourishing in diverse ecosystems up to the 66-million-year asteroid impact, overturning the idea of a slow pre-extinction decline; fossil evidence from New Mexico and elsewhere shows regional bioprovinces and thriving dinosaur communities, with mammals later rebounding while geographic patterns persisted into the Paleocene.

via Indian Defence Review|

#asteroid-impact #biogeography #dinosaurs

science5 months ago•4 min saved

Mysterious Spider-Like Formations on Europa and Jupiter Spark Alien Life Theories

Scientists have proposed that the mysterious spider-like feature observed on Europa's surface, initially thought to be a structure within a crater, may have formed through processes similar to Earth's lake stars, but likely resulted from an asteroid impact that created cracks allowing salty water to seep through, providing insights into Europa's subsurface and potential signs of extraterrestrial life.

via Live Science|

#asteroid-impact #damhan-alla #europa

science6 months ago•7 min saved

Students devise plan to prevent Armageddon

In the 1960s, MIT students and a professor devised a plan called 'Project Icarus' to prevent a catastrophic asteroid impact, which involved detecting and deflecting the asteroid using existing technology. Their efforts contributed to the development of modern planetary defense strategies, significantly reducing the risk of asteroid-induced extinction today.

via National Geographic|

#asteroid-impact #icarus-asteroid #mit-students

science6 months ago•3 min saved

New Research Challenges Dinosaur Extinction Theories and Reveals Hidden Oceanic Asteroid Crater

Scientists have confirmed the existence of the Nadir Crater, a 9 km wide impact crater beneath the Atlantic Ocean floor, formed 66 million years ago by an asteroid likely responsible for the extinction of the dinosaurs. Using advanced seismic imaging, they reconstructed the impact's aftermath, including tsunamis and liquefied sediments, and plan to drill cores to further study this well-preserved site, offering new insights into asteroid impacts and mass extinctions.

via The Daily Galaxy|

#asteroid-impact #dinosaur-extinction #nadir-crater

science6 months ago•4 min saved

Flashy Boom Unveils New Microbe Habitat

Researchers studying the Lake Lappajärvi impact structure in Finland found evidence that microbes colonized the site roughly 4 million years after the asteroid impact, revealing how quickly life can establish in post-impact environments and providing insights into early life on Earth and potential extraterrestrial habitats.

via Space|

#asteroid-impact #early-life-on-earth #impact-crater

science7 months ago•3 min saved

Fossil Evidence Shows Dinosaurs Thrived in North America Before Extinction

New research indicates that dinosaurs in North America were still thriving just before the asteroid impact 66 million years ago, with fossils from the last moments of the Cretaceous period showing diverse and large species like Tyrannosaurus rex, Triceratops, and Alamosaurus, challenging the idea that dinosaurs were in decline before their extinction.

via CBS News|

#asteroid-impact #dinosaurs #fossils

science7 months ago•6 min saved

Dinosaurs Thrived Until the Asteroid Impact, New Evidence Shows

New research shows that dinosaurs in North America were thriving up until the asteroid impact 66 million years ago, with fossils from New Mexico indicating they lived just 340,000 years before the extinction event, challenging the idea that they were already in decline.

via National Geographic|

#asteroid-impact #cretaceous #dinosaurs

science7 months ago•4 min saved

Hidden North Sea Crater Reveals Deadly Asteroid Impact and Tsunami

Scientists confirmed that the Silverpit Crater beneath the North Sea was formed by a 45-million-year-old asteroid impact, which caused a massive tsunami and ended a long-standing debate about its origin, using new seismic imaging and shocked crystal analysis as definitive evidence.

via Rude Baguette|

#asteroid-impact #geological-evidence #north-sea

science7 months ago•3 min saved

Scientists Find Enormous Underwater Crater Beneath Chesapeake Bay

Scientists have discovered a massive underwater impact crater beneath Chesapeake Bay, formed by an asteroid 35 million years ago, which provides insights into Earth's catastrophic past, including its effects on climate, ecosystems, and landscape changes.

via Indian Defence Review|

#asteroid-impact #chesapeake-bay #climate-change

science8 months ago•7 min saved

Scientists Confirm North Sea Impact Crater Origin

Scientists have confirmed that the Silverpit Crater in the North Sea was formed by a 40-million-year-old asteroid impact, using advanced seismic imaging and microscopic analysis of drill samples, resolving a long-standing debate about its origin.

via Space|

#asteroid-impact #earths-history #science