Researchers traced the cause of the stain to the town's water supply, which contained abnormally high levels of fluoride.

In this case, sand, water, and metal BBs. The first experiment was a mixture of salt and water used to make a can chiller for soda or beer (the blue thing in the upper right). It took some ...

Florida’s Surgeon General on Friday recommended against putting fluoride in the water, guidance that comes amid speculation he is being eyed for a position in President Donald Trump’s ...