Why does the sky get dark at night? Don't tell me it's just because the Earth rotates and the sun sets -- what I mean is, with all of its stars and other luminous bodies, why isn't the universe infinitely bright?
We hear about humidity in just about every weather report on the nightly news. There are several different ways meteorologists measure humidity, but relative humidity is the most common measurement. What is relative humidity, though? Find out in this
Around 1,800 thunderstorms are occurring on the Earth at any given time. However, they typically only occur in the warmer parts of the planet. Why does warm weather spawn more thunderstorms than colder weather?
What causes the seasons? Why are the seasons reversed in the Northern and Southern Hemispheres? And if the Earth moves in an elliptical orbit around the Sun, why don't we have two summers and two winters every year?
We can usually see rainbows right after a rainstorm on a warm Spring day. These giant colorful arcs stand out against the dark rain clouds. Have you ever wondered what causes this phenomena? Find out how rainbows are created in this article from HowStuffWorks.