Bubble formation is governed by one simple rule: minimize surface area. Free-floating bubbles are spherical because that’s the most efficient way to enclose a given volume of air. Give a soap film edges to stretch between, and its behavior gets interesting! Try building geometric bubble frames out of drinking straws and pipe cleaners. Create corner
Ever heard that the sky is blue because it’s reflecting Earth’s water? It’s a myth! If the sky was just mirroring the planet below, it would be brown in Utah. The real reason for our atmosphere’s hue has its roots in a more fundamental question: how do we see the world around us? The electromagnetic
What do egg shells, coral reefs, and human bones have in common? They’re all made of calcium carbonate! This brittle mineral compound dissolves in acid. Try submerging an egg in white vinegar (a mild acid) for 24 hours, changing the vinegar, then continuing to soak the egg for about a week. What do you observe?
The most famous star in the night sky is undoubtedly the North Star, also known as Polaris. It isn’t the brightest or most spectacular looking star, but it is nevertheless very important. Let’s take a look at why! The image above shows the north star in the Idyllwild sky. As we know, the Earth is
Light travels incredibly fast. In a vacuum, it speeds along at nearly six trillion miles per hour. Ever notice how your feet look distorted when you wade in the water, or how a straw seems to be cut in half where it enters a full glass? When light travels through a medium, it slows down.