#418 How does a laser work?
Photo by Pixabay: https://www.pexels.com/photo/assorted-color-laser-lights-417458/ How does a laser work? By focusing light into a narrow beam. LASER is actually an acronym, and […]
#417 Why are rubies red, emeralds green, and sapphires blue?
Why are rubies red, emeralds green, and sapphires blue? Rubies and sapphires are varieties of the mineral corundum. Emeralds are a variety […]
#416 Who was Molotov and why was the Molotov cocktail named after him?
Who was Molotov and why was the Molotov cocktail named after him? He was Vyacheslav Molotov, Minister of Foreign Affairs in the […]
#415 How does a Geiger counter work?
How does a Geiger counter work? By using radiation to create an electrical signal. There are four types of radiation and they […]
#414 Why do fish have scales?
Why do fish have scales? For protection, for camouflage, and to help them swim faster. There are four basic types of fish […]
#413 How do throat lozenges work?
How do throat lozenges work? They lubricate the throat, suppressing the irritation. Why do we get sore throats? The most common cause […]
#412 How do fish breathe underwater?
How do fish breathe underwater? Fish use their gills to take oxygen out of the water. Why do we need oxygen? Most […]
#411 Why don’t cats knock things over?
Why don’t cats knock things over? It turns out that cats have whiskers on their legs as well as their faces. When […]
#410 How do sparklers work?
How do sparklers work? They burn a combination of metal particles that combust in different colors. Sparklers are coated in a mixture […]
#409 Why is the Dead Sea so salty?
Why is the Dead Sea so salty? Because the sea evaporates very quickly and there is only one source of freshwater coming […]