Scientists believe that the early Earth was bombarded by both large and small objects. Now the researchers have clarified that some of the asteroids that fell on the planet could be the size of modern cities.
Unfortunately, there are almost no obvious traces of collisions with other objects in the form of craters on Earth. They do not persist due to plate movement and atmospheric phenomena. However, there is still evidence of bumps in some ancient rocks.
This evidence helped scientists create a new shock flow model. Researchers have calculated that 3.5-2.5 billion years ago, 10 times more objects could have fallen to Earth than previously thought. Some of them were huge. In general, according to scientists, the planet was attacked by large asteroids on average every 15 million years.
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