Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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The human body produces and destroys 15 million blood cells every second.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.
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The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.
Human embryonic stem cells forming rosettes, a sign of neural differentiation
False Solomons Seal
The Interiors of Earth and Mercury
Mercury Element
Really , I never thought about that What about you ?
Day 16 Neural groove appears as the neural tube begins forming.