Which begs the question - why?
Nanotechnologists at the University of Glasgow have produced the "world's smallest Christmas card." It can apparently fit onto the surface of a postage stamp 8,276 times, or onto a real holiday card some half a million times.
So, why did they do this? The researchers say the technology they used to make the Season's Greetings card could be used in products like TVs and cameras. Says Professor David Cumming: "The process to manufacture the card only took 30 minutes. It was very straightforward to produce as the process is highly repeatable. The design of the card took far longer than the production."
The card is invisible to the naked eye, which will make it even more difficult for your grandmother to put a check into.
By: Josh Sanburn