I'm not an historian but I'll venture an opinion: Modern cosmology really began with Darwin and Wallace. Unlike anyone before them, they provided explanations of our existence that completely rejected supernatural agents... Darwin and Wallace set a standard not only for the life sciences but for cosmology as well.
With this site barely born, I really appreciate the acknowledgement on Scientificblogging.com's Darwin Day 2008 page:
When biologists talk about the nuances and complexities of evolution, it's easy to get lost. Defaithed tackles the issue for Darwin Day by writing Darwin Day fun: A layman explains evolution by natural selection ... Don't let their modesty fool you. They condense a lot of complexity into 5 easy-to-understand bullet points and then flesh them out nicely.
It's an honor to be mentioned, and to be a part of celebrating one of humanity's greatest intellectual accomplishments.