From 50,000 years ago? We didn’t even know Denisovans existed before 2010. Now:
Excavations at the Denisova cave in Siberia have uncovered almost 80,000 stone artefacts that extinct humans left over a 150,000-year period. Collectively, they seem to show how technology developed by Denisovans evolved through the Stone Age, culminating with the production of spectacular bracelets, beads and tiaras about 50,000 years ago.
Colin Barras, “Thousands of Denisovan tools reveal their Stone Age technologies” at New Scientist
But where are the subhumans? In any Darwinian scheme, someone must be the subhuman. Otherwise, there is no beginning to human history.
This is all that remains of a tiara (so far):
Note: If the artifacts are very numerous, maybe AI can help with examination. See, for example, Can AI helps us decipher lost languages? Sometimes it comes down to a question of time. Who wants to spend their life deciphering thousands of cuneiform tablets or examining thousands of fragments of tools? With enough data, automation of some of that job may be possible, giving equivalent results for analysis sooner.