The Eurasian backflow was a recent migration of humans from western Eurasia back to East Africa. Homo sapiens had left Africa about 100,000 years ago, and about 3,000 years ago farmers from Anatolia and the Near East migrated back to the Horn of Africa. Signs of this migration can be found in the genomes of contemporary people from all over East Africa.
The people migrating back to Africa were closely related to the Neolithic farmers who had brought agriculture from the Near East to Europe about 7,000 years ago. This population is also closely related to present-day Sardinians.
A report in November 2015 on a 4,500 year old Ethiopian genome had originally overestimated the genetic influence of the Eurasian backflow, claiming that signs of the migration could be found in genomes all over Africa. This mistaken claim was based on a data processing error and was corrected in February 2016.