Neanderthal Genome Sequenced
In May 2010, Svante Pääbo’s team published the first draft Neanderthal genome sequence in Science, revealing that 1-4% of non-African modern human DNA comes from Neanderthal ancestors—proving interbreeding occurred between humans and Neanderthals 50,000-60,000 years ago and fundamentally reshaping human evolution narratives.
The sequencing achievement required developing techniques to extract and analyze degraded DNA from 40,000-year-old bones without overwhelming contamination from modern human DNA. Pääbo’s team sequenced DNA from three Croatian Neanderthal bones, assembling a genome enabling comparison with modern humans and chimpanzees.
The discovery that non-African humans carry Neanderthal DNA (while sub-Saharan Africans generally don’t) supported the “out of Africa with interbreeding” model over theories of complete replacement. The findings meant everyone with European, Asian, or Native American ancestry is partly Neanderthal—making Neanderthals not a separate extinct species but ancestors who contributed to modern human genomes.
The announcement generated 20+ million impressions as researchers and the public grappled with implications: Neanderthals weren’t evolutionary dead-ends but integrated into Homo sapiens lineages. Subsequent research linked Neanderthal genes to modern traits including immune responses, skin/hair pigmentation, pain sensitivity, and COVID-19 severity.
In 2022, Svante Pääbo won the Nobel Prize in Physiology or Medicine for founding paleogenomics—the field of ancient DNA sequencing. By 2023, researchers had sequenced genomes from multiple archaic human groups (Neanderthals, Denisovans) and traced their genetic legacies in living populations, revolutionizing understanding of human origins from studying bones to analyzing genomes.