There was a question mark at the end of the title suggesting that it wasn't certain.
And if it wasn't pre-human hominids that made the tools then who or what could have made them?
The official question is when does the Early Stone Age end and the Middle Stone Age begin. The MSA is the beginning of hominids who are very close to Homo Sapiens.
The article is too sensational in its suggestion that the tools may have been made by MSA hominids, which pushes the start of the MSA back 80,000 years ago.
However, there is no evidence to support the notion that they were made by anything other than ESA hominids.
My point is that the article is bad science reporting because speculation is being offered as something more than a question. We are so science illiterate in this country that we certainly don't need NatGeo contributing to junk science.