Nano Christmas Cards

The Christmas card is so small that more than 8,000 of them could fit on a first-class stamp

"The card produced by the University of Glasgow, said to be the smallest in the world, is invisible to the naked eye..."

We wish you a mini Christmas: World's smallest greetings card that is invisible to the naked eye >> dailymail.co.uk

 Nano Etching on a Hair: 3d-today.org  (Professor Martyn Poliakoff)

 http://bit.ly/gSWAHf