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Imagination is the Essence of Discovery

Why Does Iron Get Rusty?

When you leave a piece of iron for a few days in a place where it's damp or wet, a covering of rust forms over it just as if someone...

What Is Humidity?

If you put a pitcher of ice water on a table and let it stand a while, what happens? Moisture gathers on the outside of the pitcher. Where does this...

Where Does the Wind Come From?

There are two ways of looking at the wind and where it comes from. One is in terms of your immediate neighborhood, and one is in terms of the world...

What Is the Jet Stream?

Nowadays, the word "jet" is very much in the news, and we might imagine that the "jet stream" has something to do with jet planes. This isn’t the case at...

Why Do We Have Different Seasons?

Since earliest times, man has been curious about the changing of the seasons. Why is it warm in summer and cold in winter? Why do the days gradually grow longer...

How to Predict the Weather?

All the conditions of the atmosphere are weather. Whether it's hot or cold, dry or wet, sunny or cloudy, windy or still, it's the weather. The weather is changeable from...

Where Do Most Earthquakes Occur?

If you could look at a map that showed the entire surface of the earth and where earthquakes occur most often, you'd see a wavy ribbon that twisted up and...

Why Do Volcanoes Appear Only in Certain Places?

There are no volcanoes near New York City or London or Paris-nor are there likely to be any in the future. Yet there are parts of the world where there...

Why Do We Still Have Glaciers Today?

The great ice mass that began the Ice Age in North America has been called a continental glacier, it may have been about 15.000 feet thick in its center. This...