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A new study suggests a link between high levels of fluoride and lowered IQ. It's heating up arguments over fluoridating drinking water, which dentists say is critical for protecting teeth.

On Thursday, a major birding society will discuss how how to go about changing potentially offensive bird names. There's resistance to the original plan to rename all birds named after people.

One of the brightest stars in the night sky seems to be orbited by a planet like Jupiter. The news is sure to cheer fans of the Avatar series, which centers on a moon that orbits a fictional gas giant planet in this particular star system.

The opioid epidemic is intergenerational, with tens of thousands of babies born every year dependent on opioids. Advocates worry lawsuits against the drug industry might overlook these children.

With a skin sample from a 52,000-year-old woolly mammoth, scientists are gaining new insights into what made the animals tick. The findings could also help controversial de-extinction efforts.