On this day, in 1809, Charles Darwin was born.
In case you're not familiar with this little known scientist, he is best known for his theory of Evolution through Natural Selection. You know, the fundamental underpinnings of all of modern biology.
Darwin was, without a doubt, one of the greatest scientific minds to ever have lived. His contributions to the understanding of our world are almost unparalleled.
Happy birthday Charlie.
UPDATE: Whoops. I'm a day late. His birthday was on the 12th. Sorry!