BBC: How many people can the Earth can use gene sequencing to find answers

China Well -off Network September 7th. By the end of 2022, the population on the earth is expected to reach 8 billion. To commemorate this moment, the BBC Future column reviews one of the most controversial issues in our time. Is there too much from us? Or is this a wrong question?

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BBC reported that about 72,000 BC on Sumatra Island, Indonesia. The Daba super volcano is erupting, which is considered the largest incident in the past 100,000 years. A series of thunderous explosions sprayed 9.5 trillion kg of ashes. These ashes rolled in the sky and entered the atmosphere of about 47 kilometers (29 miles).

After that, the large Asian area was covered by a 3-10 cm thick dust. It blocked the water and sticks to the vegetation like cement -it was found from East Africa from Daba, which was 7,300 kilometers west (4,536 miles) west. But it is important that some scientists believe that it has caused the world to fall into the volcanic winter that lasted for decades -almost extinct our species.

As early as 1993, a group of American researchers studied the human genome to find their past clues and discovered a sign of a major "population bottleneck" -the moment when human shrinking, all offspring outside Africa were significantly more close and closer. Related.

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