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freshwater saltwater estuary
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 trace amounts of minerals (including salt) from the earth (rocks, wood, etc.) and eventually empties them into the ocean. The...

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cat

Why don’t cats enjoy the taste of sweets?

Other than cats, every other mammal (including humans) examined to date can taste sweetness. This is due to us having five types of taste...
Colonel

Why is the word Colonel pronounced like it has an “r” in it?

Here in the U.S, "Colonel" is pronounced like "kernel." Why is it spelled so differently you ask? In the 1500's, English borrowed a handful...
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...
Inside the human body

Are humans red meat or white meat?

Humans are both red meat and white meat. It depends on what muscle the meat is coming from. The main determining factor of meat color is its concentration of a protein called myoglobin. Within muscle fibers, myoglobin stores and transfers oxygen from the blood to the cellular machinery.

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