The dental proteome of the 800k year old archaic human Homo antecessor has been decoded using fancy new methods of extracting ancient biomolecules from their hosts.
If you’re not aware, Homo antecessor was a variant of Homo erectus that inhabited Europe for a time span of ultimately 400ky from 1.2 Ma to 800kya, but were ultimately a dead end in terms of evolution. It was thought they may have been the progenitor species of archaic hominin from which modern humans, Neanderthals, Homo heidelbergensis, and Denisovans arose, but it turns out they were a sister taxon not directly ancestral to any of the populations I listed above.
However, it is known that when the ancestors of the Neanderthals and Denisovans (the so-called “Neandersovans”) left Africa, they intermixed with a so-called “super-archaic” that were the remnants of an extremely early human migration out of Africa, some 1.9 Ma.
Make of that what you will.