Eye Bags

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

There are two main reasons we get bags under our eyes when we are tired. First, when humans are tired, our skin gets dull and...
clown fish

Do fish sleep?

While most fish rest by reducing their activity and metabolism, the way fish "sleep" is different from the way land mammals sleep. Most fish don’t...

What is the difference between a tornado watch and a tornado warning?

A tornado watch means that the present weather conditions are favorable for the formation of a tornado. A tornado warning means that tornado activity...

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...
The 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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