That's what is so interesting about the internet. I do a lot of research online, and I always find myself going off into different areas. I bookmark sites that are too off-topic and then go back later. It's a great way to learn about history, philosophy, science, new authors. You have to check the sources though, but of course you can never know everything!
I started reading Gould in a biological anthropology class. He was really very easy to follow, without dumbing it down, you know? I heard he was a great speaker, and I'm just kicking myself for not going when he was here a few months ago.