1) 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).

2) Many mountains have cultural and spiritual significance for local communities and are often considered sacred or revered in religious traditions.

3) Bats are the only mammals capable of sustained flight.

4) The ancient city of Rome was founded in 753 BC and went on to become one of the most powerful and influential civilizations in history.