Carl Sagan Day Nov. 7th
I'm excited that he is being honored like this, I hope that someday it will be more widely recognized. I would argue that he was one of the most important figures of the later part of last century. Not only was he key in introducing a generation to the importance to science, he also made significant contributions to our understanding of the solar system and universe. On a more humanitarian note, he is largely responsible for spreading the concept of the nuclear winter and putting real consequences in the minds of those who argued for nuclear proliferation.