Population Bottleneck: Humans on the Verge of Extinction Due to Climate Extremes

Human Population on the Verge of Extinction: Revealing Findings from Chinese Academy of Sciences Research

Extensive research has uncovered a startling revelation about the history of human existence on Earth. According to a recent publication in the prestigious scientific journal Science by the renowned Chinese Academy of Sciences, it has been determined that human population size experienced a rapid decline leading to near-extinction approximately 900,000 years ago. The startling findings suggest that at that time, the human population stood at a mere 1,280 individuals, comparable to numerous endangered animal species residing on our planet today.

Based on an in-depth analysis, this population bottleneck endured for over 100,000 years, ranging from approximately 930,000 to 813,000 years ago. Profoundly, the research team asserted, “At the onset of the bottleneck, approximately 98.7% of our human ancestors vanished, pushing our species perilously close to the brink of extinction.”

To effectively estimate past population sizes, the research team developed a revolutionary fusion model called FitCoal. Through the examination of genetic lineages and scrutinizing the genome sequences of 3,154 individuals from 10 African and 40 non-African regions, crucial insights were gleaned. It became evident that around 930,000 years ago, the number of potential human ancestors capable of reproduction plummeted to a mere 1.3%. Astonishingly, the global reproductive population precipitously declined from 100,000 to an alarmingly low 1,280. Remarkably, indicators of this population bottleneck have been directly observed within all 10 African groups, while faint signs were detected within 40 non-African groups. During this period, the scarcity of fossils of ancient humans in Africa and Eurasia further corroborated these findings.

Professor Chris Stringer, a noteworthy authority from the esteemed Natural History Museum in London, commented, “It is awe-inspiring that humanity has emerged from this critical juncture. A population of that magnitude could have been decimated by a single harrowing event, such as severe weather, an epidemic, or a volcanic eruption.”

Climate change of an extreme nature has been posited as a potential factor that contributed to human extinction during this period. The research team postulated that the timing of the population bottleneck coincided with Pleistocene climate variations, such as prolonged glacial periods, reduced sea surface temperatures, and protracted droughts experienced in Africa and Eurasia. Moreover, significant gaps in the fossil record of humans in these regions further substantiated this theory. Accordingly, they concluded that “such extreme climate change could have triggered a bottleneck that nearly erased the lineage of our ancestors.”

Nevertheless, some scientists exercise prudence when interpreting these findings. Dr. Nick Ashton of the esteemed British Museum underscored the importance of testing this hypothesis against archeological and fossil evidence pertaining to humans. He raised the possibility that this phenomenon may be confined to non-Homo sapiens populations or may have been short-lived in nature.

Publish a thesis in the Science Journal of the Chinese Academy of Sciences

Population bottleneck… climate extremes like the ice age

Some “We need to compare human archeology and fossil evidence”

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Research has shown that a long time ago humans were on the verge of extinction on Earth.

According to the Guardian and others on the 31st (local time), a research team from the Chinese Academy of Sciences published a paper in the scientific journal Science, which states that the human population declined rapidly and went into extinction around 900,000 years . according to. At that time, the population was around 1,280, which is roughly the same size as the currently endangered animal population.

This population bottleneck lasted for over 100,000 years, between about 930,000 and 813,000 years ago. “About 98.7% of our human ancestors disappeared at the beginning of the bottleneck, putting our ancestors on the brink of extinction,” the research team said.

The research team developed a fusion model (FitCoal) that can estimate past population sizes by examining differences between genetic lineages, and analyzed the genome sequences of a total of 3,154 people from 10 African and 40 non-African regions.

As a result of the analysis, it was found that, around 930,000 years ago, the number of human ancestors who could have children dropped very steeply to 98.7%. The world’s reproductive population has dropped significantly from 100,000 to 1,280. Signs of population bottleneck were directly found in all 10 African groups, and weak signs of bottlenecks were found in 40 non-African groups. It is said that there are almost no fossils of ancient humans in Africa and Eurasia at this time.

Professor Chris Stringer, of the Natural History Museum in London, said: “It’s amazing that humans have come through this. A population of that size can be done with one bad weather event, an epidemic or a volcanic eruption.”

Extreme climate change is cited as a cause of human extinction. The research team explained that the timing of the population bottleneck coincided with Pleistocene climate changes, such as prolonged glacial periods, lower sea surface temperatures, and prolonged droughts in Africa and Eurasia, as well as significant gaps in the fossil record of humans in Africa and Eurasia. “An extreme change in the climate may have created a bottleneck that almost wiped out the lineage of our ancestors,” they analyzed.

However, some scientists are cautious about these findings. “This theory needs to be tested against the archaeological and fossil evidence of humans,” said Dr Nick Ashton of the British Museum. It is likely that this effect is limited to wider non-Homo sapiens populations or that the effect was short-lived. .”

#years #human #survivors..


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