Professor of Ignorance John Lloyd and his curator Lee Mack welcome comedian and writer Karen Dunbar, metallurgist Professor John Wood and breakfast radio host Shaun Keaveny.

Karen Dunbar, comedian, actor, star of Chewing the Fat and the woman who opened the Glasgow Commonwealth Games to an audience of one billion people, donates the karaoke version of the song "I Will Survive". She donates it because she used to work as a karaoke host, and she wants the song sent to the museum so she can never hear it again.

John Wood, a metallurgist and engineer, and specialises in looking at small things with bigs things, working at CERN and creating a laser that was a billion times brighter than the Sun, offers up a single atom of iron. It is the fourth most common element of iron, but Wood could not create a pure atom of iron.

Shaun Keaveny, the host of BBC 6 Music's breakfast show, who also created an award for the Queue Awards and the Tina Turner Prize (rather than the Q Awards and the Turner Prize), provides an old-fashioned tube of toothpaste. He offers it up because it is one of the few things that never disappoints.