The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.
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Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
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Anti-aging claims should not ever be believed. There is no supplement, medication, or any other substance that has been proven to slow or stop the aging process.
Plant Cell (Blank Labels)
Human hand and wrist anatomy
Human Skeleton Diagram
Time Line of Human History From Upper Paleolithic Period to the Present
The traditional human karyotypes derived from a normal female and a normal male
Relationship between the number of amino acid substitutions