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Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
Everyone has one nostril that is larger than the other.
Did you know?
In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.
Did you know?
Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
Did you know?
Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.