A new study to stimulate the debate on the guilty strike that has changed the world for 12800 years

Nearly 12,800 years ago, as the Earth appeared from the last large ice age, sudden temperatures in the northern hemisphere Decline Return to the circumstances close to Al -Jala. The reason for this sudden transformation – known as the cold period in Dreyas, is a puzzle to this day, but the new evidence may give credibility to its most controversial interpretation.

The researchers analyzed the nuclei of the sediments extracted from the sea floor in the Bavin Bay near Greenland, where there were indications of a cosmic effect on the layer that is associated with the younger dias. The results published on August 6 in the magazine Plos oneHe suggested that the comet-or its remains-was created in the atmosphere of the earth almost at the same time, when this cold, which lasted 1200 years started.

A controversial hypothesis

The study provides new support for The hypothesis of the younger dry effect. In 2007, researchers Proposal These fragments were struck by the disassembled guilty or the asteroid of the Earth about 12,800 years ago, which led to forest fires throughout North America. Such a catastrophe would have produced enough soot and ash to disassemble the sun and slide the northern hemisphere into a cooler state.

It is an elegant explanation, but it is a great interpretation. Researchers have not found the effect of the effect that will prove this event, so supporters are largely dependent on geochemical evidence in the layers of deposits dating back directly before the start of the younger Dryas.

Amid the lack of final evidence to the hypothesis of the younger dry effect, and most experts instead Subscribe To the hypothesis of melting water, which indicates that a flood of freshwater from the melted snow plate that covered most of North America during the Pestestoine era temporarily interferes with the peripheral currents that transplant the heat to the Earth. Previous geochi evidence from the cores of the ocean deposits Support This idea, but scientists have not yet determined the exact path that this apparent flood took.

Searching for evidence of influence

The authors of this recent study, led by the archaeologist at the University of South Carolina Christopher R. Moore, that both hypotheses may be correct. It is often referred to (the hypothesis of the younger dry effect) as an alternative to the water pulse hypothesis, “Moore He said In an interview with one plos. “What many people do not understand is that Ydih proposes an event event (which is likely to involve thousands of thousands of effects and Airbursts at the global level) that shakes the stability of the ice ice cover in the northern hemisphere, which leads to the collapse of the huge ice melting waters and then to close the ocean stove belt.”

Previous studies on the nuclei of the ground deposits found geodic guides for the influence of the comet about the beginning of the younger Dreyas, but Moore and his colleagues wanted to see whether the ocean nuclei would contain the same clues. If this is the case, this would cool the arguments that the wild evidence of the younas impact of the younger effect resulted from old human activities, according to More. His team has discovered the multi -influenced agents, which dates back to the appropriate time period within the oceanic core, including mineral molecules with compositions that indicate the comedy, hygiene -rich iron and silica.

Doubt remains still

However, not everyone is convinced. “I don’t see anything in this new paper that overcomes chronic and continuous problems with their previous papers,” said Mark Boslo, an applied physicist and research professor at New Mexico University, in an email. As an explicit critic of the younger DRYAS effect, he believes that there are much simpler interpretations with our current understanding of influence, weather physics, Earth sciences, and astronomy.

“On the roof, they reported that it seems strange and impressive, but these are not expected results of events outside the planet, and I do not think that the authors consider the seriousness of more normal explanations,” said Buslo.