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) The world's largest particle accelerator, the Large Hadron Collider, is located near Geneva, Switzerland, and spans a circumference of 17 miles (27 kilometers).

3) The ocean covers about 71% of the Earth's surface and contains roughly 97% of the planet's water.

4) The blue whale is the largest animal to have ever existed, with an average length of about 82 feet (25 meters).