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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

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The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).

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There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

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More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.

Five Times August - This Too Shall Pass Five Times August - This Too Shall Pass
A sphere represented by means of modeling. A sphere represented by means of modeling.
Normal oxygen sensor frequency is from about one to five times per second. Normal oxygen sensor frequency is from about one to five times per second.
Inhalers used to deliver asthmatic drugs: (a) Metered-dose inhaler. The patient times the inhalation ... Inhalers used to deliver asthmatic drugs: (a) Metered-dose inhaler. The patient times the inhalation ...
Genomic and fossil evidence has been used to estimate the times of divergence of human and Neanderth Genomic and fossil evidence has been used to estimate the times of divergence of human and Neanderth
Estimated times of divergence of human and Neanderthal genomic Estimated times of divergence of human and Neanderthal genomic
Video: The Vestibular System

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