Dating stone tools vlg dating ru
Inn the desert badlands of northwestern Kenya, scientists have discovered stone tools that date back some 3.3 million years, long before modern humans were on the scene.
The tools are now considered the oldest stone tools to date.
Credit: MPK-WTAP Closer look So how did this mysterious group craft these stone tools?
Some scientists thought hominins started "knapping," or banging one rock against another to create sharp-edged tools so that they could cut meat from animal carcasses.
They are by far the oldest such artifacts yet discovered.
The tools, whose makers may or may not have been some sort of human ancestor, push the known date of such tools back by 700,000 years.
But earlier finds suggest a possible answer: The skull of a 3.3-million-year-old hominin, Kenyanthropus platytops, was found in 1999 about a kilometer from the tool site. platyops tooth and a bone from a skull were discovered a few hundred meters away, and an as-yet unidentified tooth has been found about 100 meters away.Before becoming managing editor, Jeanna served as a reporter for Live Science and for about three years.Previously she was an assistant editor at Scholastic's Science World magazine.Jeanna has an English degree from Salisbury University, a Master's degree in biogeochemistry and environmental sciences from the University of Maryland, and a science journalism degree from New York University. The Earth Institute at Columbia University announced today (May 20, 2015) that scientists working in the desert badlands of northwestern Kenya have found stone tools dating back 3.3 million years, long before the advent of modern humans.
The Earth’s magnetic field periodically reverses itself, and the chronology of those changes is well documented going back millions of years.