Last Updated: Friday, 21 December 2007, 00:02 GMT Historic penguin sketches found The signed chalk drawings are to be cleaned and restored Penguin sketches made by Captain Scott and Ernest Shackleton have been found in a basement at Cambridge University. The legendary explorers drew the pictures on blackboards, probably for public lectures, in 1904 and 1909. Nobody knows how the fragile images, in need of cleaning and restoration, ended up at the University's Scott Polar Research Institute. Staff are appealing for donations to help preserve the signed chalk drawings and put them on public display. Chalk and charm "People often...