This document provides data on the chemical composition and abundance of elements in the universe, sun, and human body. It shows that hydrogen and helium make up 75% and 23% respectively of the universe and sun, while oxygen constitutes 21% of air and 61% of the human body, despite oxygen only making up around 1% of the universe and sun. The document also notes that oxygen was discovered in 1775, although its discovery is attributed to multiple scientists working independently at the time.