A Number Of 15,500- year-old stone spearheads might be the earliest weapons on record in The United States and Canada. These as much as 4-inch-long (10 centimeters) spears are so old they might even precede the Clovis individuals, who were long believed to be the very first group to occupy the Americas.
However some archaeologists are doubtful of the strategies utilized to date the spearheads, which were discovered near Austin, Texas. Since there was no raw material near the spearheads to utilize for radiocarbon dating, the researchers utilized optically promoted luminescence (OSL), which demonstrates how long ago quartz grains in the sediment were exposed to sunshine. That’s not the gold-standard method usually utilized to date such artifacts, nevertheless, professionals formerly informed Live Science.[Read more about what may be the oldest North American weapons]