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Smithsonian Magazine

Smithsonian Magazine

What Centuries-Old Shark Teeth Reveal About Brazil's Ocean

Smithsonian Magazine
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87% Informative

A condo development threatened the remains of a 13th-century coastal fishing site on Santa Catarina Island in southern Brazil in 1996 .

Archaeologists excavated shark teeth from the site and compared them to modern shark teeth collected in the same region between 1975 and 2010 .

Researchers found that different types of sharks were feeding on animals that occupied the same level of the food web.

This article is from Hakai Magazine , an online publication about science and society in coastal ecosystems. Read more stories like this at hakaimagazine.com..