Monday, February 9, 2026

Scientists were wrong for decades about DNA knots

Scientists have discovered that DNA behaves in a surprising way when squeezed through tiny nanopores, overturning a long-held assumption in genetics research. What researchers once thought were knots causing messy electrical signals turn out to be something else entirely: twisted coils called plectonemes, formed as flowing ions inside the pore spin the DNA like a phone cord. These twists can linger and grow as DNA moves through, leaving clear electrical fingerprints.

from Top Health News -- ScienceDaily https://ift.tt/gf5z7NM

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Millions of kids take melatonin but doctors are raising red flags

Melatonin is now widely used to help children sleep, but scientists say the enthusiasm may be getting ahead of the evidence. A major review ...