According to the scientist the oldest rock that is discovered is 3.3 million years from now, which is discovered in Kenya. This marks a new archaeological record. More than 149 of them were found near the lake in turkana in the northern hemisphere.
The tools which were found existed even before the time of hominines. Hominin are classified as Homo sapiens and our closest evolutionary ancestors.
The discovery leads us to a theory that who made these types of tools knew that how these tools can be used.
According to the author of the study who says that these tools have a good control and strong grip. The design on the tools was made by pound tools or pound sharp flakes.