freshwater saltwater estuary

How can the oceans be saltwater when the rivers that flow into them are...

The freshwater found in rivers originates from rainwater and melting snow/ice. As this water flows downriver towards the ocean (or sea), it picks up...
A glass of Tang

Was Tang really invented in space?

No, Tang was not invented in space. It was invented in 1957 by a food chemist named William A. Mitchell while he was working...
crude oil coming out of pipe

Why is there so much oil in the Middle East?

There isn't necessarily more oil in the Middle East; it's just the most cost-effective place to extract oil from due to it having ideal conditions...
turtle shell

What happens to a turtle’s shell after it dies?

A turtle's shell will eventually decompose, but at a much slower rate than its flesh, innards, and organs due it being made of bone...
Meijer ammonia

Where does ammonia come from?

Ammonia is made by something called the Haber process which combines nitrogen from the air with hydrogen derived mainly from a natural gas such as methane....

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