A finger-bone from the other archaic humans – besides Neanderthals, there were Denisovans. And one of the fragments we know them from looked like this, found in a cave in what’s now Russia.
We put our own past together like a puzzle.
From the image’s page on Wikimedia Commons:
Replica of a Denisovan finger bone fragment, originally found in Denisova Cave in 2008, at the Museum of Natural Sciences in Brussels, Belgium.