Discovery of two hidden human lineages
A recent study has found that human DNA contains traces of two ancient human lineages for which no direct fossil remains have been discovered. The first lineage existed in Africa over 50,000 years ago and interbred with anatomically modern humans, leaving its mark in about 0.5-1% of the DNA of contemporary humans, possibly linked to the Homo Heidelbergensis. The second lineage dates back to more than a million years ago and is believed to be related to Homo erectus. It interbred with Denisovans in Eurasia around 200,000 years ago, influencing the modern genome. The study, which analyzed 500 genomes, shows that traces of these ancient lineages are present across all human populations, revealing that our DNA conceals a significant portion of human evolutionary history that was previously unknown.
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