Mysterious apocalypse: Danger of extinction (II)

The threats threaten human survival a lot. They can come from some faraway place in the vast universe, from the Sun, from the continuous activity of matter in the Earth's heart, even it can come from human beings through combat operations. painting or ignorance.

Bulk and regular

The hazards, when they occur, will lead to the immediate and immediate destruction of a wide range of species. So does science have any evidence of this?

In 2001, two physicists at Bekerley University, RARohde and RAMuller, published in Nature the reliable evidence of mass extinctions that occurred regularly and in a regular manner with a cycle of 62 - 65 million years. once.

The last time was the dinosaur extinction 65 million years ago. We are nearing or nearing the deadline for the next extinction on Earth. Is this extinction related to the end of the world?

The threat comes from the Earth .

Yellowstone super mountain(Source: Internet).

An example of a threat from Earth, a larger scale that could cause mass extinction, was the tsunami that claimed 230,000 lives in 2004 by the Indian Ocean earthquake. It is one of the natural hazards from Earth that has caused the greatest damage ever. However, it will be nothing compared to the Yellowstone volcano, located mostly in Wyoming, USA, if it works, this is the most dangerous volcano in the world.

If it explodes, the whole atmosphere on Earth will be covered by sulfuric acid, smoke, dust and bringing their planet into the cold winter makes human civilization return to the starting point. Studies show that this volcano has erupted at least 100 times, in which three fierce times can cause disaster for half of the Earth (the eruption cycle is from 600 to 700 thousand years). The most recent eruption was 640 thousand years ago. In that cycle, we are waiting for the next boom.

A recent study by NASA discovered a hot spot - a large-sized lava drive in Tokyo's city under this volcano is about to explode. The signals show that it is about to explode: the lava drive has increased by about 0.75m since 1992, which is a very large number in terms of geological time of only about mm / century; It is located 20km from the ground, only 1/10 of the depth of other lava drives, if so, a terrorist group that puts this volcanic bomb can trigger the eruption; The activity of the lava drive was so strong that it swept the Yellowstone Lake above it to the south, causing water in the lake to flow out, flooding the trees in the surrounding area.

. and from the polar magnetic field

Since childhood we have been taught basic knowledge of spherical Earth and have gravity so that people can travel on it, oxygen-containing atmosphere to respiratory humans, the atmosphere has ozone to avoid rays. Ultraviolet . However, a very important knowledge is that the Earth has a magnetosphere, a shield that shields the species below from the constant bombardment of cosmic rays is almost impossible. teach. Whether you know it or not, the magnetic field shield produced by molten metal cores in the Earth's core persists in removing protons and electrons from the Sun into harmless belts to protect us. .

Earth's magnetic field is also a threat to mass extinction (Source: Internet).

The problem is that the strength of the Earth's magnetic field currently in the North-South direction will change in the opposite direction, ie in the South-North direction. In the past, Earth's magnetic field has been repeatedly flipped. The study of rock core and sediment samples indicates that the last island occurred 780 thousand years ago. The reversal time lasts hundreds of years.

It has been discovered that the recent weakening of the Earth's magnetic field may be a sign of magnetic field reversal. During the North - South to South - North reversal, there will be a time when the Earth has a multitude of magnetic poles so the compass will point in all directions, the species that move based on the Earth magnetic field will lose direction. can move to places where food is present, storm intensity, cyclone rise and especially Earth's organisms can be affected by cosmic rays. This is a threat of mass extinction.

Assoc. Prof. Dr. Nguyen Hoang Hai ( Hanoi National University )