In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.
The effect of thyroid hormones on tadpole development