New study identifies connection between diabetes medications, multiple sclerosis

Early Martian Ocean Was Over 300 Meters Deep, New Research Suggests

Earth now weighs six ronnagrams: New metric prefixes voted in

Can someone clarify what this fluoride study in public water sources is trying to say? From what I read, it’s implying that fluoride levels in public water sources is over the recommended limits that causes harm and has no benefit on reducing incidence of tooth decay.