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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
There are more sensory neurons in the tongue than in any other part of the body.
There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.
Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.