Richard Dawkins is a best seller author on the subject of evolution and an outspoken atheist. He holds the Charles Simonyi Chair in the Public Understanding of Science at the University of Oxford.
James "the Amazing" Randi is a stage magician, a skeptic and best known as a debunker of pseudoscience.
Michael Shermer is a science writer, historian of science, founder of The Skeptics Society, and editor of its magazine Skeptic.
Steven Pinker is a cognitive scientists, the Johnstone Family Professor of Psychology at Harvard University and author of a number of best-selling books.
Daniel Dennett is a prominent American philosopher. Dennett's research centers on philosophy of mind and philosophy of science, particularly as those fields relate to evolutionary biology and cognitive science.
Phil "The Bad Astronomer" Plait is an astronomer who runs the website Badastronomy.com. He works at the physics and astronomy department at Sonoma State University.
Massimo Pigliucci is a professor of Ecology and Evolution at the State University of New York at Stony Brook and is known as an outspoken anti-creationist and advocate of science education.
Point of Inqury (rss) - Center for Inquiry’s radio show and podcast
Skeptics Guide to the Universe (rss) - The New England Skeptical Society
The Amazing Show (rss) (itunes) - starring James Randi
SETI (rss) - SETI (Search for Extraterrestrial Intelligence) podcast
Scientific American (rss) - The Scientific American magazine's podcast
American Freethought Podcast (rss)
Humanist Network News (rss)
The Reason Driven Podcast (rss) (itunes)
The Non Prophets (rss)
The Atheist Experience (rss)
Freethought Radio (rss) - Freedom From Religion Foundation's podcast
Skepticality (rss) - Skeptical discussion, critical thinking, and assorted fun
Truth-Driven Thinking (rss)
Evolution 101 (rss) - A short weekly show on the topic of evolution
Nature Podcast (rss)
Equal Time for Freethought (rss) - New Jersey Humanist Network's podcast
The Skeptic Tank (rss)
LogicallyCritical (itunes) (rss)
QuackCast (rss) - Critical look on alternative medicine
Reasonable Doubts (rss)
Secular Nation (rss)
Skeptoid (rss)
MIT - Massachusetts Institute of Technology
Berkley - University of California Berkeley (itunes)
Caltech - California Intitute of Technology
UWTV - University of Washingotn Television (science)
Princeton - Princeton University
UCTV - University of California Television (science archive) (google video)
Beyond Belief 2006 - Great minds discuss religion and science
TED Talks (rss) - Great talks by fascinating people
Lectures Archive
NOVA Online - Online documentaries and more
Exploratorium - Exploratorium's webcast archive
Research Channel
LearnOutLoud
Freethought Radio
Freethought Media
onegoodmove - several clips from recent events in the media (mostly political)