Evidence that researchers have put forth to support this "Younger Dryas impact hypothesis ... scientists looked at black mats of earth containing so-called "impact markers" — signs of cosmic ...

Geologists call this blip of frigid conditions the Younger Dryas ... of the Younger Dryas. Half a dozen of the sites also have thin layers of organic-rich sediments called “black mats ...

West began traveling the country, visiting archaeological sites that dated to the beginning of the Younger Dryas. At many of the sites he visited, he found the same black mat, containing the same ...

This period featured abrupt ... Researchers continue to expand the case for the Younger Dryas Impact hypothesis. The idea proposes that a fragmented comet smashed into the Earth's atmosphere ...

Prior evidence based on ice cores taken from Greenland has suggested that a strike by a comet may have led to the onset of the Younger Dryas—a period of Earth cooling that lasted for ...

A meteor or comet impact near Quebec heaved a rain of hot melted rock along North America's Atlantic Coast about 12,900 years ago, a new study claims. Scientists have traced the geochemical ...

“This range overlaps with that of a platinum peak recorded in the Greenland ice sheet and of the onset of the Younger Dryas climate episode in six independent key records,” explained ...