(CNN) – The invention of the Americas might have occurred sooner than beforehand thought.
Two years in the past, dozens of historical footprints have been found in New Mexico’s White Sands Nationwide Park.
The crew of scientists that studied the world decided these tracks have been made greater than 21,000 years in the past.
Nonetheless, researchers started to debate the tactic used to estimate the age of the footprints.
In response to a examine revealed Thursday within the journal “Science,” new strains of proof – together with the evaluation of quartz crystals within the sediments – led researchers to imagine the tracks have been set by folks crossing into North America 29,000 years in the past.
Some critics of the primary examine say this up to date knowledge is encouraging, however they nonetheless have some doubts.