Earth’s magnetic field is old
Our Earth’s magnetic field has been discovered, not surprisingly, to be much older than previously thought. From a scientific standpoint, this discovery is fairly monumental. This research revealed the old estimates were 3.7 billion years old, while the new estimate of when it began is 200 million.
Scientists have announced the discovery of a new type of fossil at the annual meeting of the American Geophysical Union in San Francisco, according to Nature.
Scientists have found evidence of a magnetic field on Earth that dates back close to 4 billion years ago. We can only speculate as to what caused the magnetic field, but one theory suggests that these rocks were formed by the collision of a massive meteorite with our planet. In 2015, other scientists announced that they had discovered magnetic field evidence in zircon crystals in Australia. The evidence is at least four billion years old. The scientific community is uncertain about the discovery. Scientists, hence, cannot verify that dating of the magnetic materials within zircons is accurate.
The amazing magnetic field – created by molten iron in our planet’s core – has played and continues to play a vital role in making Earth a place hospitable to life, protecting living organisms from potentially dangerous solar radiation, and also helping to provide us with the oxygen we rely on for survival.
There is no way to be certain exactly what time it was when the Earth formed. Even so, ancient rocks have been found. There are some traces of magnetism in them, traced back to when the Earth was still newly forming.
Nichols served two expeditions to Greenland, in 2018 and 2019. He examined some rocks near Isua in western Greenland which have sparked intense scientific controversy because of the possibility of them containing fossils of complex microorganisms dating back 3 million years ago. “Other scientists must confirm these findings”.
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Author: PC-GR
The World of Technology
