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Species Evolution

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Peer-Reviewed Study Ties Severed Orca Fins to Rare Predation by Bigg’s Whales

Researchers say the cases highlight deep ecotype divisions that may have shaped residents’ tight family bonds.

Scientists Name Salwasiren qatarensis From Qatar’s Densest Sea Cow Fossil Bed

Anacondas Have Stayed Giant for 12 Million Years, Fossil Study Finds