When the scientists recovered the tags from two male sand tiger sharks in 2013, the downloaded data told an unexpected story. (sciencedaily.com)
In contrast, modern sand tiger sharks living today in the Atlantic Ocean are very intolerant of low salinity, requiring three times the saltiness of the Eocene sharks in order to survive. (sciencedaily.com)
«Through an analysis of fossil sand tiger shark teeth from the western Arctic Ocean, this study offers new evidence for a less salty Arctic Ocean during an ancient «greenhouse period,»» says Yusheng «Chris» Liu, program director in the NSF's Division of Earth Sciences, which co-funded the research with NSF's Division of Polar Programs. (sciencedaily.com)