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Entertainment8 common mistakes when taking care of teeth
We often brush our teeth 1-2 times a day but just brushing our teeth in the morning or evening is not enough to have a perfect smile.Regular brushing reduces the risk of arthritis
Scientists believe that regular brushing will reduce the risk of arthritis. The reason because the bacteria that cause gum disease and arthritis are related.
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Can carp live 10 years in a tank without feeding?
Why do Italy and Switzerland have to redraw the border?
Japanese bullet train accident-free for 60 years
The world's most crowded apartment building: Can accommodate up to 30,000 people, the view inside is overwhelming
World's oldest wine jar contains cremated human bones
America catches strange signal from 1.3 billion light years away from Earth
Two black holes closest to Earth discovered, of a kind never seen before
Solar sails help spacecraft reach Mars in 26 days
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