Of the 118 chemical elements found on Earth, only 21 make up the human body. Here we break down the elemental composition of the average human.
Human life expectancy is more than twice as long as it was in the 19th century. How do our lifespans rank compared to 49 other animals?
Nearly 95% of the Earth’s surface shows some form of human modification, with 85% bearing evidence of multiple forms of human impact.