Teeth can become discolored on their outer surfaces when people consume colored foods and drinks, such as coffee, tea or red wine.
20 Jul 2018 10:03 AM
Researchers have now developed a new, less destructive method.
19 Jul 2018 7:24 PM
Hydrogen peroxide also promoted the evolution of enzymes called catalases that prevented a second origin of life event.
13 Nov 2017 12:59 PM