Die alten Menschen verbrannten 25.000 Jahre lang Gräser zur Heilung und Magie

This article assumes a lot.

It states itself that animal droppings could account for much of the grass however animals don’t burn their droppings. It then assumes that people brought grass in to the caves rather than burning animal droppings, which was a very common practice in early human society. Animal droppings, especially ungulate droppings, were used as long-lasting heat and light sources. But this article never addresses this possibility, and by its own admission, leaves this as a distinct possibility.

Yeah, ancient humans were pretty stupid by modern standards. 🤷

Burning grass for *fun* is cool though.