sperm
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Scientists Have Created Functional Sperm From Stem Cells
Scientists from China have made history by taking a cell that’s not a sperm cell and then used it to create a live animal. A similar technique could be used one day to treat infertility in humans.
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Scientists Can Now Make Fake Sperm Swim
What you’re seeing in this video is obviously a sperm cell, except it was made in a lab, not a testicle. It’s designed to show how passive elastic swimming can mimic, fairly well, the motions that allow sperm (or fish) to swim.
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Bird Eggs Need Extra Sperm To Make Chicks
You know the story of mammalian fertilisation: millions of sperm enter the vagina, only one fertilises the egg, more than one messes up the embryo, yadda yadda yadda. Turns out that’s not the only way it can work.
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This Video Proves That Penguin Sex Can Get Kind Of Messy
Video: Two penguins at the Monterey Bay Aquarium decided to make baby penguins in front of their viewing window. In the process, they showed off a fascinating aspect of bird reproductive biology.