c. 550000 BCE - c. 765000 BCE
Estimated time of divergence between the branch that would develop into Neanderthals on the one hand and Denisovans on the other, and the branch that would lead to Homo sapiens.
c. 430000 BCE - c. 473000 BCE
Estimated time of divergence of Neanderthals and Denisovans.
c. 287000 BCE - c. 55000 BCE
Denisovan occupation of Denisova cave. Denisovan DNA found in cave sediments (that have yielded no bones) in Denisova Cave indicates this group of humans was present at this site between 287,000 (or, conservatively, c. 200,000) years ago and c. 55,000 years ago.
c. 50000 BCE - c. 195000 BCE
Timespan covered by the current collection of Denisovan fossils. The oldest fossil (Denisova 2) is between 122,700-194,400 years old and the youngest (Denisova 3) between 51,600-76,200 years old.
c. 44000 BCE - c. 54000 BCE
Estimated time at which Denisovans interbred with the ancestors of present-day Melanesians, presumably in Southeast Asia.