Footprints left behind in layers of clay and silt at New Mexico’s White Sands National Park may be between 23, 000 and 21, 000 years old. That’s based on radiocarbon dating associated with the remains of grass seeds buried in the layers regarding sediment above and below the tracks. If the dates are correct, the […]
Enlarge (credit: Luna) Dogs tagged along with the first humans to venture into the Americas, according to a recent study that analyzed existing collections of canine and human DNA. The results suggest that people domesticated dogs sometime before 23,000 years ago in Siberia, where isolated groups of wolves and people were struggling to survive the […]