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A formidable asteroid, measuring around six miles in diameter, was responsible for Earth's most recent mass extinction event. Recent findings have traced its origins.
Distinct from most asteroids that currently collide with our planet, this enormous space rock originated from the region beyond Jupiter, classified as a "C-type asteroid." These asteroids are typically dark and rich in carbon—remnants from the outer reaches of our solar system. The collision left remnants scattered across the globe about 66 million years ago.
"This object was a projectile sourced from the far reaches of our solar system that sealed the fate of the dinosaurs," explains Mario Fischer-Göddé, an expert studying asteroidal and planetary origins at Germany's University of Cologne.
SEE ALSO:
NASA scientist experienced awe when viewing initial Voyager images.
Fischer-Göddé spearheaded this groundbreaking research published in the esteemed journal Science.
The aftermath of this cataclysmic event is starkly evident today; it is known as the Chicxulub Crater, which lies primarily concealed beneath Mexico's Yucatan Peninsula. The massive asteroid collided with shallow waters, ejecting vast amounts of pulverized debris into the atmosphere and inducing severe climatic shifts. This led to an extended period characterized by extreme cold that halted photosynthesis. As ecosystems collapsed, nearly 70 percent of species on Earth perished; however, blank" data-ga-click="1" data-ga-element="offer" data-ga-label="$text" data-ga-item="text-link" data-ga-module=contentbody rel=noopener>some dinosaur species managed to survive.".
A minute layer of sediment marking this historic incident can be found across our planet today—the K-Pg boundary layer—which contains ruthenium; an element scarce in Earth's crust indicates that nearly all traces present stem directly from the notorious asteroid itself. Moreover, researchers determined that ruthenium isotopes within this distinctive stratum bear similarities to carbonaceous meteorites discovered globally while contrasting sharply with remnants linked to other significant impacts originating within our inner solar system.
"Our analysis shows that attributes belonging to Chicxulub's impacting asteroid align closely with those found in carbonaceous meteorites stemming from regions situated beyond Jupiter’s orbit," stated Fischer-Göddé.
blank' >Earlier studies had suggested involvement by a C-type asteroid but did not focus on ruthenium traces due to challenges associated with obtaining these measurements—progressive technological advancements now make such intricate assessments viable; only about three laboratories worldwide possess capabilities for conducting specialized analyses like these.
The C-type Mathilde discovered by NEAR spacecraft on June 27th, 1997 measures roughly 38 miles (61 kilometers) across.
Source: NASA / JPL / JHUAPL
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Unraveling the Mystery: Scientists Trace the Origins of the Dinosaur-Killing Asteroid!
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