Short, sourced answers to the questions people actually ask: how many, how likely, what percentage. No fluff, no clickbait. Just the number and where it comes from.
people live on Earth today, more than ever before.
people have ever walked on the Moon. All of them between 1969 and 1972.
of the ocean is still unmapped, unobserved and unexplored.
people die somewhere in the world every second.
is the yearly chance of being struck by lightning in the US.
of an adult human body is water, give or take.
The number comes in the first line. Context, history and comparisons follow below.
Every figure links to its primary source: statistics offices, UN, WHO, NASA, NOAA.
Each page shows when it was last checked, and we update it when new data is released.