How much Neanderthal DNA do people outside Africa carry on average?
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One to two percent
The legacy of shared children after the migration out of Africa. Some of those genes still affect immunity, skin and sleep.
12 questions · Science
No other early human has suffered so badly from its reputation. When quarry workers found a skull cap and bones in the Neander Valley near Düsseldorf in 1856, the remains were first taken for those of a Cossack with rickets; later a flawed reconstruction turned a severely arthritic old man into the prototype of the stooping, shuffling brute. Both were wrong. Neanderthals walked as upright as we do, had on average a slightly larger brain than modern humans, hunted with spears in teams, cared for the sick for years, produced birch tar glue (a process demanding temperature control without oxygen) and probably painted Spanish cave walls as early as 64,000 years ago, long before Homo sapiens reached Europe. Their bodies were built for cold: powerful, broad-chested, with short limbs that conserve heat. They lived from about 400,000 to 40,000 years ago across Europe and western Asia. And they did not vanish without trace. When Svante Pääbo's team sequenced their genome in 2010, it turned out that everyone outside Africa carries one to two percent Neanderthal DNA: the legacy of encounters and shared children. Some of those genes still shape immunity, skin and sleep today. Why the Neanderthals died out is unresolved; most likely it was no war but a mix of climate swings, small populations and plain displacement. Their scientific name is an irony of history: the valley was named after the hymn writer Joachim Neander and "Neander" is simply the Graecised form of "Neumann", new man.
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One to two percent
The legacy of shared children after the migration out of Africa. Some of those genes still affect immunity, skin and sleep.
Foto: AquilaGib · CC BY-SA 3.0 · Wikimedia Commons
From the Neander Valley near Düsseldorf
Quarry workers found the first recognised bones there in 1856. The valley itself is named after hymn writer Joachim Neander: whose family name was actually Neumann.
Slightly larger on average
About 1,500 against roughly 1,350 cubic centimetres. Size alone says little about thinking: the proportions of brain regions differed.
No
That image goes back to a 1911 reconstruction of an old, severely arthritic skeleton. Neanderthals stood and walked as upright as we do.
From about 400,000 to 40,000 years ago
Across Europe and western Asia as far as Siberia. Their last refuges probably lay in the south of the Iberian Peninsula.
Foto: Neanderthal-Museum, Mettmann · CC BY-SA 4.0 · Wikimedia Commons
It was an adaptation to cold
A compact body has less surface relative to volume and loses less heat: the same principle shows in people living in Arctic regions today.
Birch tar
Birch bark must be heated to several hundred degrees without oxygen: a multi-stage process requiring planning and control of fire.
Neanderthal cave paintings
Red lines, dots and hand stencils dated to at least 64,000 years. That would make Neanderthals the first known cave painters; the dating is still debated.
That the sick were cared for over long periods
The famous "old man of La Chapelle" survived with an almost toothless jaw and severe arthritis: hardly possible alone.
Svante Pääbo's team
At the Max Planck Institute in Leipzig: awarded the 2022 Nobel Prize in Medicine. Only the genome turned suspicion into certainty: there were shared children.
A combination of climate, small groups and displacement
No "war of species" is documented. Small, isolated populations with little genetic diversity are fragile: slight disadvantages add up over millennia.
A hyoid bone like ours
The find from Kebara Cave in Israel matches the modern hyoid and Neanderthals carried the same variant of the speech gene FOXP2 as we do.
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