Add BrightSurf on Google Email

Fluoride exposure and children’s IQ scores

A systematic review and meta-analysis found an inverse association between fluoride exposure and children's IQ scores. The findings suggest a dose-response relationship between fluoride levels and IQ across multiple countries, highlighting the need for comprehensive public health risk-benefit assessments of fluoride exposures.

SourceJAMA Network·JournalJAMA Pediatrics·DateJan 6, 2025

A measurement first: NIST 'noise thermometry' system measures Boltzmann Constant

Researchers at NIST have developed an electronic technique called Johnson noise thermometry to measure the Boltzmann constant with an uncertainty of 12 ppm. This method has the potential to advance international efforts to revamp the world's scientific measurement system, enabling more precise definitions of units like the Kelvin.