On December 20, 1996, at the age of 62, died one of the greatest minds of 20th century: Carl Sagan, an American astronomer, astrophysicist, cosmologist, popularizer of science and rational thinking. He died at the Fred Hutchinson Cancer Research Center in Seattle, after a long and difficult fight with myelodysplasia. I don't think I have to tell you about his importance, and the role he played in the popularization and defense of rational thought.
Carl Sagan is one of my role-models,…Continue
This is LAGEOS. Since 1976, this perfect disco sphere has been orbiting Earth carrying 426 cube corner reflectors made of fused silica glass—except four, made of germanium. It also contains a coded message, designed by Dr. Carl Sagan.
The message was duplicated in two 4 x 7-inch stainless steel plates and contains several codes telling things about Earth. The first…Continue