[SunkenCiv]

http://www.universiteitleiden.nl/en/news/2016/02/neanderthals-collected-manganese-dioxide-to-make-fire

[cassiusking]

That video lets you see the grinding marks from when they worked the stones to make powder

[Mariner]

Fascinating.

There's no archaeological record of modern man using these rocks to make fire easier.

Maybe Neanderthals were not dumb or inferior cognitively to man.

I suspect their small numbers were destroyed, mostly, by diseases they had no immunity to.