Novel sex-determination mechanism revealed in mammals

In mammals, the distinction between male and female at the chromosomal level is due to the X and Y chromosomes. Typically, females have two X chromosomes (XX) while males have an X and a Y chromosome (XY). The Sry gene on ...

30-million-year-old amphibious beaver fossil is oldest ever found

A new analysis of a beaver anklebone fossil found in Montana suggests the evolution of semi-aquatic beavers may have occurred at least 7 million years earlier than previously thought, and happened in North America rather ...

Gene required for jumping identified in rabbits

Rabbits and other hopping animals require a functional RORB gene to move around by jumping, according to a new study by Miguel Carneiro of the Universidade do Porto and Leif Andersson of Uppsala University published March ...

Naked mole rats migrate above ground with no help from the moon

A full moon conjures an image of a person transforming into a werewolf—a mythical story of moonlight explaining the unexplainable. While werewolves may only exist in the movies, unusual animal and human behaviors noticed ...

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