Countries of the World

The earliest microscopes were called flea glasses because they were predominantly used to observe small insects such as fleas! These microscopes were simple in construction, using different shapes and sizes of glass with low power (6x to 10x). They were invented by the Romans.

What’s the first and only band to play on all seven continents? If you guessed Metallica, you’re right! The heavy metal band set this record after they performed at Argentina’s Carlini Station in Antarctica. They played before an audience of 120 scientists inside a small dome.

If you're thinking about learning a new language, here's a good reason you should go ahead with those plans: learning a language can help improve memory and slow down the process of aging! Sounds like a pretty good reason to start, right?