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Author Question: Concrete operational thinking is characterized by decentration, flexibility, and reversibility. ... (Read 58 times) |
In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).
There are 60,000 miles of blood vessels in every adult human.
Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
Glaucoma is a leading cause of blindness. As of yet, there is no cure. Everyone is at risk, and there may be no warning signs. It is six to eight times more common in African Americans than in whites. The best and most effective way to detect glaucoma is to receive a dilated eye examination.