Most creatures on Earth disappeared 2 billion years ago

Experts analyze rock samples in Hudson Bay and find that the number of organisms on Earth has dropped sharply due to the change in oxygen.

80 - 99.5% of ancient organisms on Earth may have died due to the changing environment after the oxygen disaster (GOE) 2 - 2.4 billion years ago , Newsweek announced on September 2. Research. The team was surprised to analyze a billion-year-old rock sample in Hudson Bay, Canada, and trace the event. This is the period when the amount of oxygen on Earth increases and then suddenly drops sharply.

The Earth has experienced many mass extinctions.(Photo: NASA / GSFC).

"About 100-200 million years before the event, there were many living things on Earth. After that, a large amount was destroyed without recovering like recent extinctions , " said Peter Crockford, co-worker. pseudo-research.

"Calling this event a mass extinction is not entirely appropriate, because we probably will never know exactly which animals disappeared. However, it seems that the number of organisms on Earth then. plummeted, " he added.

The new discovery could help scientists predict the distant future of the Earth, according to Crockford."Like two billion years ago, today's biosphere (including humans) depends on the foundations of the food chain, which is marine microorganisms and terrestrial plants. The high probability of oxygen will not change." change so fast and so much that it makes people pay too much attention, but it could completely change over the next few billion years , " he said.

The most serious extinction event that scientists have known is the Permian extinction - Triassic about 252 million years ago. This event caused 96% of marine species and 73% of terrestrial vertebrates to disappear.