Gillette wrote world's smallest ad on piece of beard hair
Gillette created the world's smallest advertisement, which was engraved on a piece of human beard hair, according to the Guinness World Records. The advertisement, measuring 65.15 microns by 59.34 microns, contained the words 'our best work is viewed up close'. It was created in April 2011 at the University of Nottingham, United Kingdom. 