The impact of the asteroid caused the sea level to rise by 60 centimeters * This effect is relatively minor to the extinction of the dinosaurs even though it is probably a body of the same size or a series of impacts * The reason - the impact occurred during an ice age
Avi Blizovsky
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Scientists have been able to map huge impact craters hiding under the deep Antarctic ice sheet, using satellite technology.
The craters were created as a result of an asteroid with a diameter between 5 and 11 km that broke up in the atmosphere or a stream of comets or comet fragments. It is a series of craters that covers an area of 2,092 km by 3,862 km.
The scientists said at a conference held this week that the impact occurred approximately 780 years ago during an ice age. When the asteroids hit, they caused the ice layer to melt and damage the ground below.
Prof. Frans van der Hoeven (van der Hoeven) from the University of Delft in the Netherlands, said at the International Geographical Society conference in Glasgow that the largest impact in the series caused a hole measuring 322 km by 322 km.
This impact caused the melting of about one percent of the ice sheet and raising the level of sea water all over the world by about 60 centimeters. The researchers speculate that an asteroid the size of the one that caused the extinction of the dinosaurs 65 million years ago could have hit the Earth in the relatively recent past. Early humans were then already living in Africa and other parts of the Old World, but the impact occurred during an ice age, so tidal waves would also have weakened due to the stabilizing effect of the glaciers on the ocean.
The craters were mapped using data from satellites that map gravity anomalies under the ice sheet.
For news at the BBC
They knew cosmic collisions
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