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PMC is a free full-text archive of biomedical and life sciences journal literature at the U.S. National Institutes of Health's National Library of Medicine (NIH/NLM).
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Oct 23, 2024 · Hidden wonders: laser data reveal a dense network of ancient Maya settlements. Survey pinpoints pyramids, rural settlements and a large city in an unstudied stretch of …
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PubMed Central® (PMC) is a free full-text archive of biomedical and life sciences journal literature at the U.S. National Institutes of Health's National Library of Medicine (NIH/NLM).
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How to find the millions of journal articles, ebooks, images, and other media available on JSTOR and Artstor as Open Access or free to everyone.
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