cetacean

Orcas: Fossil hints that killing whales is a recent adaptation

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A 1.4-million-year-old fossil relative of killer whales had teeth that suggest it ate small fish rather than large marine mammals Life 7 March 2022 By Christa Lesté-Lasserre Artistic reconstruction of Rododelphis stamatiadisi Rossella Faleni A 1.4-million-year-old ancestor of orcas and false killer whales seems to have dined on small fish – which suggests its descendants … Read more

Clitoris evolution: What dolphins reveal about female sex organs

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By Jessica Hamzelou Bottlenose dolphins are “hypersexual creatures” imageBROKER / Alamy Stock Photo Patricia Brennan has forged a controversial career in studying the twist and turns of the evolution of animal genitalia. A biologist based at Mount Holyoke College in South Hadley, Massachusetts, her latest research suggests that bottlenose dolphins have clitorises that have evolved … Read more