A new theory about the Earth - when life begins

The new study supports the complex life hypothesis, including those animals that may have evolved once before human history is known.

Specifically, the study found 2.3 billion years ago that the Earth had an "overflowing" atmosphere of oxygen, the period of "proximity" to the original Earth period.

This important finding is called the " Lomagundi " event , which allows the ancestors of many low to higher-order plants and animals to exist billions of years ago on our planet.

The occurrence of dense oxygen occurs in the early years of the Great Ancient Age.

According to Micharl Kipp, a scientist at the University of Washington in Settle, USA, and the head of the study, "The occurrence of dense oxygen occurs in the early years of Nguyen Sinh ancient neck, earlier. " oxygen disaster " stage (GOE), which is related to carbon isotope series, is known as "Lomagundi" event.

Earth used to exist "oxygen oasis" 2.3 billion years ago?

The chemical analysis of Lomagundi rock shows that the amount of organic carbon buried deep in the ocean suddenly surges.

The researchers said that the content of Selenium (Se) and Se in total organic carbon has a very high rate during this time.

Selen's presence shows that the atmosphere 2.3 billion years ago contained oxygen. Selenium occurs when rocks are eroded by the atmosphere in the atmosphere and under the influence of geology, Selenium is drifted and accumulated in the ocean floor.

However, there are still many controversial reasons why our atmosphere loses oxygen, when it previously existed a lot.

According to research published in September 2016, during the past 800,000 years, the amount of oxygen on Earth has continuously decreased, reaching the threshold of 0.7%. Although this number is not enough to harm the lives of humans and animals, it still makes scientists "crazy" for reasons over the years.

To answer this difficult question, Kipp and his colleagues are still studying and analyzing the content of selenium in ancient rock layers at the bottom of the ocean.

The Earth once had "oxygen oasis" for a while.

According to Timothy Lyons, a researcher at the University of California, the amount of oxygen detected during this period can support life for many organisms, or even some animals.

Timothy said that the Earth once had "oxygen oasis" for a while.

Kipp and colleagues measured the ratio of Selenium isotopes formed in Lomagundi rocks in different parts of the world, and then estimated the level of dissolved oxygen in the shallow seas during this period.

Measured results are less than 5 micromol / l, less than the dissolved oxygen level in modern times of 325 micromol / l. However, the level of 0.9 micromol / l may also be the minimum oxygen level that many low-level marine species can survive.