The Earth used to be a giant snow globe

According to a study published in Nature, Earth's magnetic field has not changed since more than 2 billion years ago. This confirms a very difficult hypothesis: our green planet was once a giant snow globe.

American geologist David Evans of Yale University in New Haven collected a lot of general geomagnetic data of the Volcanic (salt) rocks from the Proterozoic (Proteorozoic era that existed before complex life forms came out). shown on Earth).

According to Dr. Evans, the magnetism of these rocks confirms that the Earth's magnetic field is mainly formed around a dipole axis. He deduced that at the time of the New Era (Neoproterozoic, the last Proterozoic century 1 billion 540 million years ago), the Earth looked like a snowball.

It is known that this last century is an ice age in the equatorial regions of the Earth. Some argue that other regions also cover ice, but according to others, this phenomenon has been circled and explained by the tilt of the Earth.

Today, the tilt of the Earth is 23.5 degrees, the poles are the coldest region and the equatorial regions are the hottest areas, but if this inclination exceeds 59 degrees, the situation will reverse: the Pole will become hot and cold equator. Due to this seesaw situation, the ice has developed near the equator.

But the magnetism of evaporated rocks analyzed by Dr. Evans from geological sediments at latitude 10-35 does not reflect any change in this inclination.

Dr. Evans asserted that the Earth in the past was a giant snow globe, unlike in the ice ages other than ice covering only high latitudes to varying degrees.

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