Lesotho is entirely surrounded by South Africa — one of only three countries fully inside another

The shortest international border is between Botswana and Zambia — about 150 meters

Botswana-Zambia border: approximately 150 meters

A single teaspoon of soil contains more microorganisms than people on Earth

"One teaspoon of soil hosts more microbes than Earth's human population."

There are more possible chess games than atoms in the observable universe — about 10^120 vs 10^80

Chess games exceed the observable universe's atom count: 10^120 > 10^80

Mongolia is the most sparsely populated country — 2 people per square kilometer

Mongolia has a population density of approximately 2 people per square kilometer

There are more possible arrangements of a deck of cards than atoms on Earth — 52! ≈ 8 × 10^67

Card arrangements vastly exceed Earth's atoms: 52! ≈ 8 × 10^67

Basque is a language isolate — unrelated to any other known language on Earth

Basque is a language isolate, not related to any other language family