If you thought, “Lightning!” then hats off to you. There is one more illuminating answer in mind. The air around a lightning bolt is superheated to about five times the temperature of the Sun. This sudden heating causes the air to expand faster than the speed of sound, which compresses the air and forms a shock wave; we hear it as thunder.  Read More →

The color blue has a calming effect. It causes the brain to release calming hormones. Blue is the color of the ocean and the sky. When the waves of the sea are light blue and gently lap at the store, it means that the weather is nice, peaceful, and calm. Peaceful, tranquil blue causes the body to produce calming chemicals, so it is often used in bedrooms.  Read More →