Comedian Tim Fitzhigham, physicist Simon Singh, and Gavin Pretor-Pinney, author of The Cloudspotter's Guide and co-founder of The Idler donate Don Quixote, a pigeon-spattered telescope and an extremely rare cloud to the museum.

Gavin Pretor-Pinney, co-founder of The Idler magazine and author of The Cloudspotter's Guide donates a very rare type of cloud to the museum and also discusses the dangers of falling through larger clouds.

Physicist and journalist Simon Singh chooses as his exhibit the Horn Antenna, a radio telescope covered with pigeon droppings which provided the first real evidence of the Big Bang.

Comedian, author and the first man to cross the English Channel in a bath Tim Fitzhigham donates the book Don Quixote to the museum and talks about his own attempts to live like a knight.