The sperm pit

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Conservationists in New Zealand have come up with a novel way of raising money for one of the country's lesser-known endangered bird species - by holding a race to see which male stitchbird, or hihi, has the fastest sperm. Correct guesses win prizes donated by sponsors, and monies raised will help fund conservation work supporting remaining hihi colonies. It's the idea of Dr Helen Taylor and her colleagues at the University of Otago, who study inbreeding in small populations of bird species through the medium of sperm quality. Endangered species such as the hihi experience lower genetic diversity and risk infertility altogether, she told Newstalk ZB radio. Confessing that the sperm race is a "weird idea" , she nonetheless thinks it ideal to raise awareness of the hihi, which relies on human intervention to help it thrive in unfamiliar habitats, including nest boxes and supplementary feeding.
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Sperm race funds rare New Zealand bird's survival

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The Long, Winding Tale of Sperm Science | Science | Smithsonian Magazine

The massive black-and-white sperm twists and spires up his right forearm, appearing to burrow in and out of his skin before emerging into a fist-sized head on his bicep. Nor is the Syracuse University biologist reserved about his unusual body art, which once made an appearance in a montage of notable scientist tattoos published in The Guardian. In his lab, Pitnick engineers the heads of fruit fly sperm to glow a ghostly red and green so that he can observe them moving through dissected female fly reproductive tracts. He hopes his work will help reveal how sperm behave within female bodies, an area of research that's still in its relative infancy. These kinds of innovations could one day explain the great diversity of sperm shape and size across the animal kingdom.
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Sexy Swimmers: 7 Facts About Sperm

With every ejaculation, men produce around million sperm cells. How much do you know about these wiggly little cells? Read on for 7 surprising facts about sperm. Want supercharged sperm, or just a nudge to the slow guys?
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Trying to conceive is a total mind-game. Good news: sperm are way faster than you think. However, sperm cells remain in the urethra for hours after a man has ejaculated. In fact, a recent study found that four hours after ejaculation, viable sperm cells are found in the urethra and the urethral fluids of 70 percent of men.
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