(CNN) A version of this story appeared in Wonder Theory, the first-ever CNN space and science newsletter, which launched Saturday. The CNN Space and Science team is lucky enough to experience genuine awe -- the eye-opening, can't-stop-thinking-about-it kind -- on a weekly basis. The oldest known remains of modern humans in Europe have been identified in the Bacho Kiro Cave in Bulgaria, dating back as far as 45,930 years ago. The Neanderthal DNA in East Asians today can be traced back to interactions between Neanderthals and early modern humans in Europe 45,000 years ago, new research has revealed. Together, these findings suggest that Europe was settled by two different groups of modern humans earlier than 45,000 years ago.

Source: CNN April 17, 2021 15:00 UTC