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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.
Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.
The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.
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.
Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.