Visitors look at dinosaur footprints while visiting with a tour guide the Cal Orcko cliff in Cal Orcko, on the outskirts of Sucre, Bolivia, July 22, 2016. (Photo/Agencies)
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Visitors look at dinosaur footprints while visiting with a tour guide the Cal Orcko cliff in Cal Orcko, on the outskirts of Sucre, Bolivia, July 22, 2016. (Photo/Agencies)