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Meet the Protein That Plugs a Sperm Into an Egg During Fertilization

The successful union of egg and sperm in fertilization depends on a sperm cell’s ability to get through an egg’s thick protective coating and latch itself to its membrane. A study published in the journal Andrology yesterday gives us our first look at the protein responsible for the tie-down. » 8/27/15 2:40pm Thursday 2:40pm

Animal sex has never looked this good...or bizarre

Deep sea fish assimilating males for extra sperm, flies frozen mid-coitus for 20 million years, and a walrus's penis bone... it's all part of "Sexual Nature", a new exhibition at London's Natural History Museum that spotlights the many awesomely strange forms that animal intercourse can take. Let's go on a Valentine's… » 2/14/11 12:30pm 2/14/11 12:30pm