The biologist Svante Arrhenius died at the age of 68. Here is all you want to know, and more!
Biography - A Short Wiki
A Swedish scientist who was known for his work with electrolytes. He was the first scientist to attempt to account for changes in the levels of carbon dioxide in the atmosphere, and how it might alter the surface temperature through the greenhouse effect.
He married Sofia Rudbeck in 1894, though they eventually split up. He later remarried Maria Johansson in 1905.