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There is the first evidence of the existence of a 4.5 billion-year-old "pre-Earth"
Scientists have discovered that deep inside the Earth, materials that formed before the giant collision that formed the Moon may be preserved. The authors of the study, published in Nature Geoscience on October 14, noted that the chemical traces they found could be remnants of our planet's early, pre-Earth era.
According to the study, about 4.5 billion years ago, when the solar system was forming, a Mars-sized asteroid collided with the Earth. The impact that formed the Moon, and scientists believed that at that time, all traces of early Earth's chemistry were destroyed.
However, the study found a lack of potassium-40 in ancient rocks, which, according to the researchers, could be a "trace" of early Earth material. The samples were taken from Greenland, Canada, and Hawaii. Scientists have concluded that the Earth's depths contain materials that formed in the earliest era of the planet, billions of years ago.
