Jennifer Nalewicki is a Salt Lake City-based journalist whose work has been featured in The New York Times, Smithsonian Magazine, Scientific American, Popular Mechanics and more. She covers several science topics from planet Earth to paleontology and archaeology to health and culture. Prior to freelancing, Jennifer held an Editor role at Time Inc.
The first humans to settle the Amazon Basin arrived around 13,000 years ago as part of a mass migration that quickly swept across the Americas, researchers have discovered.
While it was previously known that this area had been occupied beginning at least 12,600 years ago, as evidenced by the rock art, researchers were able to get a better understanding of how the area was utilized and any instances when it wasn’t occupied at all. For the new study, archaeologists collected soil samples from two rock shelters in the region. The team analyzed the stratigraphy, or layers, of the sediments and found different layers containing stone fragments, charcoal and"high levels of organic matter indicative of food preparation, consumption, and disposal," according to the statement.
The analysis showed there were periods when the shelters were completely abandoned — in some cases for more than a millennium at a time. Within the soil, researchers spotted 3,000-year-old ceramics, 2,500-year-old evidence of soil cultivation and 500-year-old traces of maize, according to the study. The analysis also revealed how early the locations were occupied.
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