Ancient North Americans gouged elaborate rock art into a heap of big boulders northeast of Reno, Nev., more than 10,000 years ago and perhaps 15,000 years ago.That makes the carvings the oldest known petroglyphs on the continent, according to a paper published in the Journal of Archaeological Science.Along the way, he learned that the most recent wet period lasted until 10,300 years ago, and not 11,000 as experts had previously believed.). Jenkins, the University of Oregon archaeologist, had previously discovered the oldest human remains in North America in what's known as Paisley Caves in Central Oregon.
A concha bullosa is a pneumatized (air-filled) cavity within a turbinate in the nose.(Concha is another term for turbinate.) Bullosa refers to the air-filled cavity within the turbinate. It is a normal anatomic variant seen in up to half the population.Concha is another term for turbinate.) Bullosa refers to the air-filled cavity within the turbinate.
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