https://www.live-feeds.com/feed/fruit-fly-sperm-are-giant-how-do-they-stay-untangledContinuously updated, source-cited coverage. https://www.live-feeds.com/feed/fruit-fly-sperm-are-giant-how-do-they-stay-untangledhttps://www.live-feeds.com/feed/fruit-fly-sperm-are-giant-how-do-they-stay-untangled#u27891Fri, 31 Jul 2026 11:30:56 +0000Sexually reproducing embryos must distinguish between cell lineages for the body and the germline. The germline produces eggs or sperm to transmit genetic data. Failure to establish this boundary prevents reproduction.What's confirmed:Embryos of sexually reproducing organisms must decide which cell lineages form the body and which become the germline.The germline is the lineage that produces sperm or eggs to carry genetic information to the next generation.An organism that fails to correctly establish these lineages may survive but cannot reproduce. https://www.live-feeds.com/feed/fruit-fly-sperm-are-giant-how-do-they-stay-untangledhttps://www.live-feeds.com/feed/fruit-fly-sperm-are-giant-how-do-they-stay-untangled#u20662Wed, 01 Jul 2026 21:21:04 +0000Male Drosophila melanogaster produce sperm cells nearly as long as their own bodies. These cells use collective motion to align in orderly bundles. This process prevents knots that would otherwise block reproduction.What's confirmed:Drosophila melanogaster males produce sperm cells nearly 2 millimeters long.Fruit fly sperm are roughly 40 times larger than human sperm.Thousands of sperm cells are packed into storage organs significantly smaller than the cells themselves.Sperm cells prevent tangling by pushing against each other and moving in orderly bundles.Biologists at the Flatiron Institute&