If you’ve never heard of Tetrahymena thermophila, your world is about to get much stranger.  This little beauty, a single-celled creature that’s been at the heart of many major discoveries, has seven sexes that can mate with each other!  In a paper just published in PLoS Biology, a team of scientists have described the intricate dance of DNA editing and rearrangement which determines the sex of a new T. thermophila.

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