Why is hydrogen peroxide sold in brown bottles?

Hydrogen Peroxide is sold in brown (or dark) bottles because it can decompose into water if it's exposed to light. Opaque bottles keep the...
Kola Superdeep Borehole

What is the deepest hole in the world?

The Kola Superdeep Borehole is the deepest hole in the world as of April 2020. In 1970, Soviet scientists began drilling the Kola Superdeep Borehole in...
Topping off your gas tank

Should I top off my gas tank after the pump handle clicks?

Topping off your gas tank (aka gas topping) is not a good idea for mechanical, environmental, and financial reasons. Any gas you put in...
bags under the eyes

Why do we get bags under our eyes when we are tired?

There are two main reasons we can get bags under our eyes when we are tired: dehydration and fluid accumulation. First, when humans are tired,...
blue sky

Why is the sky blue?

This one is tough to explain in a few paragraphs, but here it goes. To understand why the sky is blue, we first need to...

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