300,000-Year-Old Genomes Decipher History of Schöningen Horses

Scientists from the Senckenberg Centre for Human Evolution and Palaeoenvironment and the University of Tübingen have successfully reconstructed the genomes of Equus mosbachensis, an extinct horse species dating back approximately 300,000 years. The DNA was recovered from fossils found at the Schöningen archaeological site in Lower Saxony, Germany. This marks the oldest DNA ever extracted from an open-air site, pushing back previous limits set by discoveries in caves or permafrost.

The remarkable preservation was due to exceptionally favorable conditions at the site. The ancient horse bones were found in sediments that were permanently moist and low in oxygen, creating a natural protective environment that prevented rapid DNA decay. This allowed researchers to employ specialized molecular techniques and develop new bioinformatic methods to piece together the ancient genetic material.

The Schöningen site is famously known for roughly 300,000-year-old wooden spears, the world's oldest known complete hunting weapons. The discovery of at least 20 horse fossils alongside these spears provides strong evidence of the significant role horses played for early humans as a food source long before domestication. The genetic analysis confirms that the Schöningen horses belong to the lineage considered the origin of all modern horses, offering crucial insights into equine evolutionary history.

Published in Nature Ecology & Evolution, the study fills a significant temporal and geographic gap in horse evolution research. The findings suggest that ancient DNA can survive in seemingly unfavorable environments, opening possibilities for extending these recovery methods to other species and uncovering further genetic diversity from the distant past. This breakthrough could revolutionize our understanding of prehistoric life.