What causes body odor?

The human body has two types of sweat glands: eccrine and apocrine. Eccrine glands are present all over your skin and secrete mainly water.Apocrine glands, on the other hand, develop at puberty in your armpits and a few other places on your body. When microbes feed on the apocrine sweat they produced the unpleasant smell.

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Why hasn’t the sun burned out yet?

This was the most frequently asked question in the 19th century.                                          At the time, Humans understood  only two ways the sun could be generating energy: either it was creating heat and light through gravitational contractions————pulling itself in at the center and emitting energy (in the form of heat that we feel on Earth), therefore getting smaller over time—————or it was literally on fire, like the chemical reaction we see on Earth when we light a match or start a campfire.