Asteroids fell to early Earth 10 times more often than previously thought

The early Earth was hit by huge asteroids 10 times more often than anticipated.

Earth has been massively bombarded by asteroids, but new analysis shows that the number of these impacts may have been 10 times more.

The new study is also looking at what impact asteroids might have on Earth’s evolving near-surface chemistry.

The authors of the work note that asteroids had a significant impact on the chemistry of the earth’s surface and the ability to support life, for example, one such collision led to the extinction of dinosaurs.

Impact craters from such collisions can be seen on the Moon and other rocky planets, but atmospheric weathering and plate tectonics tend to mask any direct evidence of such events.

However, their evidence can be traced back to ancient rocks, in particular the presence of spherules: strong impacts ejected molten particles and vapors, which then cooled and fell to the Earth, where they turned into spherical vitreous particles. The stronger the impact, the more of these particles would spread from the impact site.

Using this approach, the authors note, they found that current models grossly underestimate the number of known asteroid impacts.

If you have found a spelling error, please, notify us by selecting that text and pressing Ctrl+Enter.

Leave a Comment

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Author: John Kessler
Graduated From the Massachusetts Institute of Technology. Previously, worked in various little-known media. Currently is an expert, editor and developer of Free News.
Function: Director
John Kessler

Spelling error report

The following text will be sent to our editors:

32 number 0.241385 time