Hippocrates used a powder made from the skeletons of mice. Pliny the Elder used burnt eggshells, and the ancient Arabs resorted to twigs from the Arak shrub. What were they trying to do? Clean...
You might think it’s a good idea to brush your teeth after drinking sugary fruit juice, but it isn’t. The acid in the juice weakens the tooth enamel, which can then be damaged during brushing. The...
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