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Scientific sperm news

Scientists are pulling inspiration from Noah's Ark in a new lunar proposal that they call a "global insurance policy. Instead of two of every animal, the solar-powered moon ark would cryogenically store frozen seed, spore, sperm and egg samples from some 6. Because human civilization has such a large footprint, if it were to collapse, that could have a negative cascading effect on the rest of the planet. Thanga highlighted climate change as the main concern, especially as it contributes to rising sea levels. A deadly global pandemic and large-scale nuclear war are two other major possibilities that Doomsday Clock researchers cite for catastrophic disasters. The Svalbard Seedbank in Norway, also known as the "doomsday vault," currently holds hundreds of thousands of seed samples to ensure continued biodiversity on earth.
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How human sperm really swim: New research challenges centuries-old assumption

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Human sperm don’t swim the way that anyone had thought | Science News

By Jack J. July 31, at pm. Sperm have long fooled scientists. Instead of swimming straight by twirling their tails like propellers, human sperm flick their tails lopsidedly and roll to balance out the off-center strokes. High-speed 3-D microscopy of human sperm swimming freely in the lab revealed that the cells corkscrew as they move, consistent with previous studies. Surprisingly, one was a wiggle to only one side of the cell.
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Falling sperm counts 'threaten human survival', expert warns

Epidemiologist Shanna Swan says low counts and changes to sexual development could endanger human species. Writing in a new book, Shanna Swan, an environmental and reproductive epidemiologist at Icahn School of Medicine at Mount Sinai in New York, warns that the impending fertility crisis poses a global threat comparable to that of the climate crisis. Now, Swan says, following current projections, sperm counts are set to reach zero in In the book, Swan and co-author Stacey Colino explore how modern life is threatening sperm counts, changing male and female reproductive development and endangering human life.
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Male scientists have long waxed poetic on the contents of their testes. Leonardo da Vinci drew the penis with a sperm duct that connected directly to the spinal cord. The 17th-century microscopist Antonie van Leeuwenhoek claimed that each sperm cell contained within it a folded-up human being waiting patiently to unfurl. Most recently, a series of alarming headlines — as well as a new book by an epidemiologist at Mount Sinai Medical Center in New York — warned that falling sperm counts might threaten the future of the human race. Most of these headlines can be traced to an influential meta-analysis by Dr.
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