Two women and two men assist during childbirth. (Image: Wikimedia/National Library of Medicine/Gustave Joseph Witkowski)

Why Were Chainsaws Invented?

Why were chainsaws invented? These handy modern tools have a surprising background. Find out their origins in medicine and in preventing maternal death

Colgate Dental Cream (Toothpaste) With Gardol - ca. 1950s (Photo: Wikimedia/Thistle33)

When Was Toothpaste Invented?

From ashes of ox hooves, eggshells, pumice, and myrrh to fluoride and sodium lauryl sulfate, the history of toothpaste has come a long way in 7000 years.

Deafening silence (Photo: Unsplash/ Kristina Flour)

What Is A Deafening Silence?

A deafening silence is the absence of sound, but it’s the noise that comes before it that really makes it deafening. You can only appreciate the silence because of the noise beforehand.

Clouds are made up of air and water. When light passes through a cloud, the water droplets scatter the light reflected from the sun. (Photo: PxHere)

Why Are Clouds White?

The answer to the question “Why are clouds white?” lies in how different-sized particles scatter the light that passes through clouds.

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