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SOS signal on a beach
SOS doesn't stand for or represent any letters, rather it's a representation of a Morse code distress signal. SOS is a continuous Morse code string of three dots, three dashes, and three dots (…---….). Since three dots represent "S" and three dashes represent "O"...

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SOS signal on a beach

What does SOS stand for?

SOS doesn't stand for or represent any letters, rather it's a representation of a Morse code distress signal. SOS is a continuous Morse code...
A cute sloth

Why are sloths so slow?

The first piece of the puzzle to understanding why sloths are so slow is their low-calorie folivorous (mostly leaves) diet. Many other folivorous animals...
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...
New York Library books

Where do libraries get their initial set of books from?

New libraries use a process called "collection development" to decide what books to purchase as well as what books to discard. Books are usually...

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