A stone tool, that is estimated to be more than 15, 000 years old bearing bison blood, has been excavated in Oregon. If it is verified to be this old, it will be America's earliest sign of habitation ever recorded.
The archeologists have found the tool while digging underneath a layer of Mount St. Helen's volcanic eruption ash, believed to have been present 15, 800 years already.
"The discovery of this tool below a layer of undisturbed ash that dates to 15,800 years old means that this tool is likely more than 15,800 years old, which would suggest the oldest human occupation west of the Rockies," BLM Burns District archaeologist Scott Thomas said.
The soil, where it was found, predates the present's timeline of the Clovis culture 2, 800 years ago. The people in the Clovis era were characterized by their fine and distinctive stone tools and were thought of as the first group of people to arrive in the American lands, traversing a land bridge the connected Alaska and the Northeastern part of Asia.
The blood residue seen on it was tested by archeologists and found out that it must have been used on an animal close to the buffalo family we see today.
"No one is going to believe this until it is shown there was no break in that ash layer, that the artifact could not have worked its way down from higher up, and until it is published in a convincing way. Until then, extreme skepticism is all they are going to get," Donald Grayson from the University of Washington shared with the Associated Press.