Humans 80,000 Years Older Than Previously Thought?
The tools were uncovered in the 1970s at the archaeological site of Gademotta, in the Ethiopian Rift Valley. But it was not until this year that new dating techniques revealed the tools to be far older than the oldest known Homo sapien bones, which are around 195,000 years old.
Using argon-argon dating—a technique that compares different isotopes of the element argon—researchers determined that the volcanic ash layers entombing the tools at Gademotta date back at least 276,000 years.
comments powered by Disqus
- 1,000 + have signed a petition protesting US government plan to commemorate the 50th anniversary of the Vietnam War
- Historian and raconteur Raychauduri dies in UK
- Group is drawing attention to the historic swath between Gettysburg and Monticello
- Conference delves into effects of climate change on native people
- History professor says the Vikings never came to Newfoundland