The supernova explosion affected the evolution of man – scientists

Вспышка сверхновой повлияла на эволюцию человека - ученые

Scientists believe that this event caused the ice age.

The earth has experienced the flash of a supernova about two million years ago. This is evidenced by the content of “interstellar” iron-60 in the rocks of the moon obtained by the expeditions of Apolonov, according to Physical Review Letters.

Scientist günther Korinek from the Technological University of Munich said that this outbreak was provoked to the Ground ice age that was the start of the last phase of human evolution.

“Flash cosmic radiation can influence how clouds are formed in Earth’s atmosphere and lower the temperature… we Can say that a supernova has affected the life of mankind,” said Korinek.

The nucleus of iron-60 is formed only during supernova explosions and in nuclei of red giants, allowing you to use it as an indicator that one or another part of the Galaxy in the recent past, an outbreak of a supernova.

Because of the short half-life of iron-60 (2.6 million years), it was believed that this isotope on Earth, not in principle.

In addition, iron in lunar rocks also found another “space” isotope is mn-53 with a similar half-life of 3.7 million years. Manganese-53, scientists explain, is born only during supernova explosions.

The proportion of both isotopes in lunar rocks were much higher than their concentrations in various meteorites that fell to Earth, which suggests that the iron in them really emerged in the bowels of a supernova, and not as a result of the activity of cosmic rays or discharge of the external envelope of the red giant.

According to calculations of scientists, the supernova trauma to the planet, occurred approximately 1.7-2.6 million years ago, at a distance of 300 light years from Earth.

Flash at this distance was not lethal for life on the planet’s surface, but it could affect the climate and thus change the course of evolution of many species on Earth.

Previously, scientists have named the cause of the first extinction on Earth that took place during the ediacaran period (Precambrian).

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