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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Fatal fungal infections may be able to resist newer antifungal drugs. Globally, fungal infections are often fatal due to the lack of access to multiple antifungals, which may be required to be utilized in combination. Single antifungals may not be enough to stop a fungal infection from causing the death of a patient.
About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.
In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.