UCSF (University of California, San Francisco) together with HHMI (Howard Hughes Medical Institute) and ASCB (American Society for Cell Biology) came up with a new great resource for people interested in biology. They created two websites called iBioSeminars and iBioMagazine that provide free-of-charge talks from leading biologists (seriously, the list of people who share their knowledge there is very impressive!). These lectures are being filmed at UCSF in a studio with "chroma key", which is really cool. You can watch the lectures online or you can download them to your computer/iPod!
Importantly, those lectures are aimed at general audience and, hence, have considerable introduction. As an example, HERE are lectures on aging by my current boss. She is a wonderful speaker with a great ability of presenting the most difficult of concepts in a very easy way, so I would definitely recommend watching her lectures to anybody who wonders why we live as long/short as we do, and how is this process regulated.
For impatient, 5 minute intro to aging:
First lecture: general introduction to the genetics of aging.
Second lecture: introduction to the reproductive pathway of aging (this is what I work on!).
On a separate note, Cynthia on CBS:
Cynthia's lecture "What does the future hold" in Cambridge: