Life 16 September 2020 By Christa Lesté-Lasserre A reconstruction of a female ostracod’s reproductive organ filled with sperm, suggesting it was inseminated shortly before being trapped in resinR. Matzke-Karasz Dozens of perfectly preserved sperm coiled up inside the reproductive tract of a 100-million-year-old female microcrustacean have been identified as the oldest animal sperm ever found.…
Author: “Smartphone use in the evening, tablet use after bedtime, and television use in the evening were all correlated with the decline of sperm concentration.“ DARIEN, Ill. — Numerous studies link smartphone or tablet use at night to trouble falling asleep. Now, a new study finds yet another compelling reason to avoid such gadgets before bed — at…
By Clare Wilson Less like an eel, more like an otterPolymaths-lab.com Sperm swim differently to how we thought. Rather than undulating their tails symmetrically, like an eel, they have a lopsided wiggle that combines with spinning about their long axis to give an overall forward motion. “The asymmetry cancels out because of the rotation,” says…
By Michael Le Page The site of sperm production, as shown in a coloured scanning electron micrograph imageSTEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY The first reliable way of isolating sperm stem cells from the testes and growing them outside the body could help infertile men have genetic children of their own. A few teams have…
Health 10 July 2020 By Jason Arunn Murugesu Sperm with an inactive portion of their tail actually swim fasterSebastian Kaulitzki / Alamy A human sperm can move up to 70 per cent faster if it has a lazy tail, a finding that could pave the way for new fertility diagnostic tests. Sperm cells use their…
Your bones could be silently thinning for years before you ever fall and break one in midlife or older age—a fate that strikes up to half of women over 50, double the number of men. At the moment of a fracture, you might not even know you’d developed low bone density, as testing doesn’t usually
States are paying contractors such as Deloitte, Accenture, and Optum millions of dollars to help them comply with the One Big Beautiful Bill Act — a law that will strip safety-net health and food benefits from millions. State governments rely on such companies to design and operate computer systems that assess whether low-income people qualify
In 2013, a scientist at Abbott Laboratories saw study results with potentially big implications for the company’s profits and the lives of some of the world’s most fragile people: preterm infants. The upshot, she wrote in an email: Babies fed rival Mead Johnson Nutrition’s acidified liquid human milk fortifier — a nutritional supplement used in