Why Is Our Galaxy Shaped like a Spiral?
A galaxy is a huge number of stars grouped together. Our galaxy contains about 1,00,000 million stars. It looks like a disc with a flat cen
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What Makes a Boomerang Come Back?
It is the built-in skew or twist in a boomerang combined with its spinning motion that makes it return to the thrower. At first people belie
Where Do Spiders Keep Their Webs?
Where Do Spiders Keep Their Webs? A spider does not have a ready made web. She spins one. If you are lucky, you may be able to watch the fem
Why Does a Compass Point North?
Why Does a Compass Point North? There are two important things that make compass needles point the way that they do. The first is the needle
Why Do Golf Balls Have Dimples?
Why Do Golf Balls Have Dimples? Most golf balls have between 300 to 500 dimples, though the pattern, depth, and number vary significantly be