Around 13,000 years ago, giant animals such as mastodons, mammoths, saber-toothed cats and ground sloths disappeared from the Earth. Scientists have found evidence in sediment cores to support a controversial theory that an asteroid or a comet slammed into Earth and helped lead to this extinction of ice age animals and cooling of the globe.
It's called the Younger Dryas Impact Hypothesis and was first suggested in 2007. The hypothesis included the idea that an extraterrestrial body impacted Earth 12,800 years ago. This led to an extreme cooling of the environment, which in turn helped cause more than 35 species of large animals to go extinct.
At the same time, human populations declined. The impact also has been suggested as the cause of large, raging wildfires that created enough smoke to block the sun and created an "impact winter," in which cold weather lasts longer than expected after Earth is impacted.
[...] Today, evidence of such an impact can be found in platinum spikes. Platinum can be found in asteroids, comets and meteorites. Researchers found them in sediment cores collected from White Pond in Elgin, South Carolina.
Sediment Cores from White Pond, South Carolina, contain a Platinum Anomaly, Pyrogenic Carbon Peak, and Coprophilous Spore Decline at 12.8 ka (open, DOI: 10.1038/s41598-019-51552-8) (DX)
(Score: 1) by khallow on Thursday October 31 2019, @03:31PM
This is the "widespread melting seen on the surface of the moon"? Interesting how paltry the supporting evidence is. And increasing solar influx from 1kW per meter to 100kW per meter for that length of time is going to screw up an entire hemisphere not merely a continent. Where's the evidence for that?