Mammalian Fertilization, Caught on Tape

The development of every animal in the history of the world began with a simple step: the fusion of a spermatozoon with an oocyte. Despite the ubiquity of this process, the actual mechanisms through which fertilization occurs remain poorly understood. A new tool developed by a team of French biophysicists may soon shed light on this still-mysterious process, and has already captured highly detailed images of what happens when sperm and egg first touch.

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