About 1.5 billion years ago the universe was formed by a gbig bangh , an infinite small mass expanded, forming both time and space as we experience it. The early universe was filled with 25% helium and 75% hydrogen, plus radiation.. With the universefs expansion, galaxies were formed, within those, suns were born. Suns, which are compact globes of gas, inside which at great temperatures. all the other elements, such as carbon, oxygen, nitrogen, were woven. These are the building blocks of life on earth. All the matter of our bodies exept hydrogen, has been processed through the sun. Energy from the sun has also led to reactions that formed more complex molecules. We truly descent from the sum.