Now, new evidence from Ukraine is helping to fill that gap.
Researchers have investigated three ancient hearths dating back to the heart of the Last Glacial Maximum.
For example, one hearth was larger and thickerlikely the one that reached the highest temperatures.
The archeological layer with traces of the large prehistoric fire.© Philip R. Nigst.
We are currently investigating whether they were used as fuel or just accidentally burned, Bosch added.
The research sheds light on one of the first and most important technologies humans ever developed.
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One of the fireplaces during excavation. © Philip R. Nigst.
