rationalskepticism.org

The Royal Institution has asked several well-known scientists and science presenters to talk about their favourite chemical element. Each day in December they upload a new video. A selection:

Alice Roberts
[youtube]http://www.youtube.com/watch?v=UGsH1s-QZzU[/youtube]

Liz Bonnin
[youtube]http://www.youtube.com/watch?v=PuUwGXRwViQ[/youtube]

Helen Czerski
[youtube]http://www.youtube.com/watch?v=EMNuYOEBOWI[/youtube]

Dara O'Briain
[youtube]http://www.youtube.com/watch?v=6Gmi9wRC5OY[/youtube]

Brian Cox
[youtube]http://www.youtube.com/watch?v=aJK7_yXGjcc[/youtube]

(the other videos can be found here)

The most interesting videos are those from Alice Roberts, Liz Bonnin, and Helen Czerski. For purely scientific reasons