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.
The day after waiving sanctions and tariffs related to Russian exports, U.S. President Donald Trump said on Saturd...
What started out as planned protests against the cost of living, declining public services and education funding in France, quickly devol...
A Saudi AH-6i helicopter crashed in the Najran region of Saudi Arabi...
The U.S. has banned government employees working in Saudi Arabia from using airports in the country without special authorisation. It comes after a deadly Houthi strike on Riyadh's King Khalid International Airport killed at least 13 people last week.
U.S. President Donald Trump has called it “a disgrace” that Ukraine has resumed attacks on Russian oil refineries. Attacks are continuing from Russia and Ukraine as media reports say Ukraine has almost run out of Patriot interceptor missiles.
An unknown projectile struck a tanker 68 nautical miles northeast of Saudi Arabia on Friday according to a report released by the United Kingdom Maritime Trade Operations (UKMTO) on Saturday.
Nationwide protests are set to begin in France on Saturday with students, trade unionists and remnants of the Yellow Vest movement expected to demonstrate against rising living costs amongst others.
A group of U.S. lawmakers is seeking to halt the Trump administration's agreement to purchase and import Russian diesel fuel, arguing that the arrangement would benefit Moscow financially while offering little relief to American consumers.
Satellite restrictions affecting Ukraine's military have put SpaceX's Starshield network under scrutiny, raising questions about who controls the technology and who can restrict its use during wartime.
More than three centuries after the dodo disappeared from Mauritius, efforts to bring the iconic bird back from extinction are taking a new step forward.
Hackers forced the temperature of fridges and freezers in hundreds of French supermarkets up to 50 degrees Celsius overnight, causing fires and food losses in what the Paris Prosecutor’s Office described as a “large-scale” attack.
A software engineer employed by OpenAI has been arrested and charged by U.S. authorities after investigators alleged he secretly placed a concealed recording device inside an executive conference room at the artificial intelligence company.
NASA's Perseverance rover has set a new driving record on Mars, travelling 45.2 kilometres since landing in 2021 and surpassing every other robotic vehicle to explore a world beyond Earth, the U.S. space agency said on Tuesday.
You can download the AnewZ application from Play Store and the App Store.
What is your opinion on this topic?
Leave the first comment