It is now clear that tools antedate man, and that their use by prehuman primates gave rise to Homo sapiens Presenting a series of articles on the human species, with special reference to its origins.

While rates of evolution have appeared to accelerate over short time periods ... and his colleague have developed new tools to help researchers filter the data. "Our work is an important step ...

Evolution is the change in organisms over time that gives rise to new species ... But biology now has new tools, from microphotography to molecular biology, with which to examine the process ...

These dates are only approximate, as the tools have been dated from the environments they were found in. This is often the layers of sediment surround the tool. Dating can be done by radiocarbon ...