What were the achievements of neanderthal and cro-magnon people

Neanderthal and cro-magnon people  produced a variety of sophisticated tools such as retouched blades, end scrapers, “nosed” scrapers, the chisel-like tool known as a burin, and fine bone tools (see Aurignacian culture). They also seem to have made tools for smoothing and scraping leather.

radioactive dating, also known as  radioisotope dating  is a process that in  estimating the approximate  age  of  rocks. these data can be analyzed from  the studies dealing with the  decay of the radioactive elements that are present in these rocks. in nature, there are a few types of materials or atoms which are quite unstable and they spontaneously decay or breakdown to form other kinds of atoms.