1) The word "mountain" contains three vowels: O, U, and A.

2) The coldest known temperature in the universe was achieved in a laboratory in 2019, reaching a fraction of a degree above absolute zero (-273.15 degrees Celsius).

3) The most intense cyclone ever recorded was Cyclone Tip in 1979, with a minimum central pressure of 870 millibars and maximum sustained winds of 190 miles per hour (305 kilometers per hour).

4) The ancient city of Athens, Greece, is often considered the birthplace of democracy, where citizens had a say in the decision-making process.