How Do We Know the Universe is Expanding?
Einstein once admitted to a mistake so large he called it his “biggest blunder.” When…
Curious Minds
How Does Soap Clean
I visited my grandmother in Greece this summer. Along with bags of food and candy,…
How Does Computer Memory Work?
From the Moon landing’s hand-woven wires to the silicon chips in your pocket. In 1969,…
Why Are Soda Cans the Shape They Are?
The secret math and physics hiding in your hand. Take a look at the can…
Why Is the Earth Spherical?
How gravity, time, and a little cosmic sculpting rolled our planet into shape. Imagine walking…
Why Do Tides Happen?
The Moon, the Ocean, and a Hidden Force That Moves Our Shores You Picked the…
Why is the Sky Blue?
Why is the Sky Blue? And Why Are Sunsets Red? On a clear day, the…
