New fossil evidence suggests echidnas evolved from a water-dwelling ancestor, not a land-based one. The bone structure ...

The humerus, pulled from a well-preserved ancient layer of sediment, belonged to a new extinct species of duck named Amazonetta cubensis, or the Cuban teal, according to a May 9 s ...

University of New South Wales. "'Extremely rare event': bone analysis suggests ancient echidnas lived in water." ScienceDaily. ScienceDaily, 28 April 2025. <www.sciencedaily.com / releases / 2025 / 04 ...