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Blood is approximately twice as thick as water because of the cells and other components found in it.
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.
In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
Most strokes are caused when blood clots move to a blood vessel in the brain and block blood flow to that area. Thrombolytic therapy can be used to dissolve the clot quickly. If given within 3 hours of the first stroke symptoms, this therapy can help limit stroke damage and disability.


