The critical moment in the evolution of the Earth: the core of the planet is much younger than herself

If we imagine that the Earth began its life as a gradually increasing a rock, it is logical to assume that the core - is the oldest part of the planet. Currently, it consists of two parts: a solid iron-nickel core and the hot fluid participating in the creation of the geomagnetic field. Scientists have suggested that the hardest part was formed about 2, 5 billion years ago, but the ancient crystals showed that the hardening took place much later. The new discovery greatly changes the perception of the evolution of the planet.

The critical moment in the evolution of the Earth: the core of the planet is much younger than herself

The University of Rochester announced that only 565 million had formed a solid core of the Earth years ago. This is evidenced by ancient crystals mined in Sept-Ilsky complex in Quebec. Inside, they have a magnetic needle, which keep a record of the state of the planet's magnetic field at the time when they were entered in minerals. It was found that about 565 million years ago, Earth's magnetic field was extremely weak, and was on the verge of extinction.

The critical moment in the evolution of the Earth: the core of the planet is much younger than herself

The study found that at the very critical moment and formed a solid core. It stabilized the magnetic field and save the planet from the harmful cosmic radiation.

The field is not collapsed, because the inner core began to grow and provide a new source of energy for the formation of Geodynamics - explained John Tarduno, one of the study's authors.

The researchers claim that their theory is backed up by computer models, but to fully determine the additional work is needed. The study not only helps to better understand the history of the Earth, but also to conduct the search for exoplanets.

The same factors that drive the movement of the conductive liquid in the world, can influence the magnetic shielding on exoplanets. Perhaps some of the planet do not have such a magnetic field as we do, that is, the atmosphere and the water is simply not available, - explained the researcher.

The scientists constantly make interesting discoveries. For example, recently they have found that the Earth's oldest stone at the moment is on the surface of our satellite - the Moon.

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