The Seven Genders of the Microbe World (Smithsonian)


Here’s one for the water cooler later: the protozoan Tetrahymena thermophila have diverse little lives in that they have seven gender options. Each one is able to mate with the other six. “It’s completely random, as if they had a roulette wheel with six numbers and wherever the marble ends up is what they get,” says Eduardo Orias, a UCSD professor emeritus, on


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