Why is the moon sometimes orange or red? Why is the sky blue? These questions are closely related!
Did you ever wonder why newborn babies have blue eyes? Or how human beings get the various eye colors we have?
We've all seen how when we splash water on cloth, the places where the water hits appear darker than the rest. Does the cloth change color when wet?
Why doesn't the flame just continue to burn underneath the bell, no matter how flat you crush it? The answer is air.
Those tiny dots are actually blood cells moving in the retina of your eye.
Scientists have found evidence that plants can sense the presence of neighbors that might cast shadows on them at some future time.
Black holes were always the most dangerous thing when traveling through space in science fiction shows. What are black holes and how do they form?
Learn how Ole Roemer learned that light does take time to travel.
Venus may appear to glow under moonlight but the planet also glows in infrared light.
There is no place on the moon that is completely dark. Learn why!