Fluorine, Shroud or Viagra?

We've got a few fun films coming up on The Periodic Table of Videos.

But which would you like to see next? Simply vote using the small poll at the right hand side of this blog. (NOTE: THIS VOTE HAS NOW ENDED AND BEEN REMOVED - RESULTS BELOW)

The options are:

- Our first up close look at Fluorine (the most reactive element)

- The Professor's discussion of Viagra (including an amazing sample from the labs at Pfizer)

- A fascinating explanation of radiocarbon dating and the Turin Shroud, filmed on location in Italy

The winner will be uploaded in the next day or two. But don't worry, the losing videos will also appear soon after.

(POST SCRIPT: The winning video was Fluorine with 45% of the vote... Here's the video)