For any UK science nerds/geeks, this is the "Holy Grail" of belly buttons.

Never thought this would happen, but Professor Alice Roberts not only shows her belly button, but talks about her stomcah.

The video is available (BBC4) for another 28 days on the BBC i-Player.

Footage starts from about 39 minutes in.

Here are some vid-caps.

She's NEVER going to show it again!

First, for those who don't know her, these are three basic portraits:

Now here's "the goods":