DNA studies reveal humans nearly vanished 900,000 years ago, with populations dropping to just a few thousand. Ancient climate chaos pushed early humans to the brink, shaping the survival story hidden in our genes today.
Around 900,000 years ago, early humans faced a crisis that could have ended our story before it truly began. New DNA research suggests that our ancestors’ population plummeted to just a few thousand individuals, a dramatic bottleneck that left a lasting mark on our genetic makeup.
“Think of it as a narrow bridge we had to cross,” says Dr. Mark Thomas, evolutionary geneticist at University College London. “One misstep, and our species might not exist today.”
The genetic fingerprints of near-extinction
Scientists studying patterns in modern human DNA, combined with ancient genetic material, can detect these population squeezes. When a species’ numbers drop sharply, rare mutations can disappear, and genetic diversity dwindles. “It’s like looking at a shadow of the past in our DNA,” explains Dr. Pat Shipman, anthropologist at Penn State University.
This bottleneck likely involved early humans such as Homo heidelbergensis and Homo erectus, long before Homo sapiens emerged around 300,000 years ago. Estimates suggest the global population may have dropped below 5,000 individuals, a dangerously low number that could have led to extinction.
Climate chaos and survival
So, what nearly wiped out humanity? Researchers point to severe climate swings during the mid-Pleistocene, including repeated ice ages that transformed landscapes and habitats. Droughts, volcanic activity, and shifting resources made survival increasingly difficult.
“Humans have always been adaptable,” says Dr. Shipman. “But bottlenecks like this remind us how fragile life can be, even for the cleverest species.” Those who survived did so through resilience, cooperation, and adaptability, passing on genes that would later help our species thrive.
Why this matters today
Understanding this ancient population squeeze is more than academic curiosity. It helps explain why human genetic diversity is relatively low, and why some rare traits appear globally. It also provides a window into our evolutionary resilience. “Studying these events teaches us about survival under pressure,” Dr. Thomas notes. “It’s a story of near-extinction that became a story of triumph.”
For the first humans, survival was not guaranteed. Yet from the brink of disappearance, they rebounded, setting the stage for the global spread of Homo sapiens hundreds of thousands of years later. The DNA within us today carries whispers of that perilous journey, a reminder that even in the harshest conditions, life finds a way.
Five people have died after a mine shaft collapsed during an illegal mining operation in southwestern China, state media reported on Sunday (31 May), ...
The Paris Saint-Germain (PSG) football team retained its Champions League title at Puskás Aréna in Budapest on Saturday night, after overcoming A...
U.S. rapper Kanye West, now known as Ye, performed to a crowd of 118,000 people in Istanbul on Saturday night, marking his first concert in Europe in ...
Thousands of people gathered across Colombo on Saturday night (30 May) as Sri Lanka's capital came alive with light and colour for Vesak, one of the m...
The World Health Organisation’s designation of the Bundibugyo Ebola virus outbreak as a Public Health Emergency of International Concern (PHEIC) is ...
Five people have died after a mine shaft collapsed during an illegal mining operation in southwestern China, state media reported on Sunday (31 May), just days after the country's deadliest mining disaster in more than a decade claimed at least 82 lives.
The Paris Saint-Germain (PSG) football team retained its Champions League title at Puskás Aréna in Budapest on Saturday night, after overcoming Arsenal 4-3 on penalties after a tense 1-1 draw following extra time.
U.S. rapper Kanye West, now known as Ye, performed to a crowd of 118,000 people in Istanbul on Saturday night, marking his first concert in Europe in more than a decade, despite being barred from performing in several countries over past antisemitic remarks.
Thousands of people gathered across Colombo on Saturday night (30 May) as Sri Lanka's capital came alive with light and colour for Vesak, one of the most important festivals in the Buddhist calendar.
A group of Azerbaijani civil society organisations has called for increased scrutiny of Swiss building materials giant Holcim, citing court rulings and ongoing investigations linked to its subsidiary Lafarge's activities during the Syrian conflict.
Iranian-made Yassin missiles were spotted mounted on Armenian Air Force fighter aircraft during Armenia's latest military parade on Thursday (28 May), drawing attention from defence observers and regional analysts.
The Philippines remains under a "severe threat" from China despite recent efforts by Washington and Beijing to ease tensions, Philippine Defence Secretary Gilberto Teodoro said on Saturday (30 May).
Thai rescuers say five people have been pulled alive from a flooded cave in remote Laos, where seven villagers became trapped after heavy rain cut off access underground.
Russia has recalled its ambassador to Armenia for consultations, citing Yerevan's growing rapprochement with the European Union. The move is seen as the latest sign of deteriorating relations between the longtime allies ahead of Armenia's parliamentary election on 7 June.
China will send an astronaut to its space station on Sunday for a one-year mission, the longest duration for the country so far. The mission will help study long-duration human physiology in space as China works toward a crewed Moon landing by 2030.
Anxiety over artificial intelligence is hardening among young workers as executives promote faster adoption and companies point to automation in fresh job cuts.
Hackers are increasingly using artificial intelligence to detect software vulnerabilities, reducing the time organisations have to respond to cyber threats, Verizon said in its annual data breach report.
China has launched the world’s first experiment to study how artificial human embryos develop in space, marking a major step in understanding whether humans could one day reproduce beyond Earth.
Japanese filmmaker Koji Fukada has said that the use of artificial intelligence (AI) to “jump straight to the result” risks undermining the purpose of art, which he believes should be rooted in self-expression and a deeper understanding of the world.
You can download the AnewZ application from Play Store and the App Store.
What is your opinion on this topic?
Leave the first comment