The Caspian Sea is the world's largest lake — technically not a sea despite the name

A prime number cannot be divided evenly by any number except 1 and itself — the largest known has 24 million digits

Prime numbers are indivisible by any number other than 1 and themselves, with the largest known having 24 million digits

A googol is 10^100 — Google was named after it (misspelled)

Google's name, derived from a misspelling of "googol," represents 10^100

The strongest muscle relative to its size is the masseter (jaw muscle)

Masseter: Strongest muscle by size, vital for mastication

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

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

Pi has been calculated to over 100 trillion digits — but 39 digits is enough to measure the observable universe to the width of a hydrogen atom

Pi's 39-digit approximation measures universe's width to hydrogen atom's size

The Sun makes up 99.86% of all mass in the solar system

The Sun constitutes 99.86% of the solar system's total mass