The Color of The Sunset
Color in the form of pigment does not exist in the atmosphere. Instead, the color we see in the sky results from the scattering, refraction, and diffraction of sunlight by particles in the atmosphere, especially small particles such as air molecules. If there…
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Biology
The Blood-brain Barrier
In the human brain, there are approximately 400-425 miles of capillaries. Because the brain is basically a…
Biology
Gestation Periods of Mammals
A gestation period is the time from conception to birth: the length of a pregnancy. In humans it is about 266…
Astronomy
Sibling Rivalry: A Mars/Earth Comparison
Scientific understanding is often a matter of making the right comparisons. In terms of studying the Earth,…
Mathematics
How To Calculate The Area Of A Cylinder
Understanding how to find the area of a cylinder is easy if one first visualizes the cylinder and breaks its…