The researchers don’t know which ancient human species made the structure and the tools, but it’s unlikely to have been Homo sapiens. The earliest fossils of Homo sapiens found so far date from around 300,000 years ago and were found in Israel, Dull told CNN. He believes the people who made the structure were cognitively sophisticated and it would be very exciting to figure out who constructed this.
There’s an interview with one of the researchers who found this on quirks and quarks last weekend. Quirks and quarks is a long running science show on CBC in Canada. Rather interesting, the scientist said at first they thought maybe the flood waters had washed the wood into that formation or something but there are apparently clear tool marks and signs it was deliberately formed.
Truly astonishing that hominids had the instinct to build couch cushion forts long before couches, cushions, or forts were even invented.