This scarf by Evil Mad Scientist Laboratories is embroidered with a message sent using the Arecibo radio telescope into space in 1974 in the hope of contacting extraterrestrial life:
The Arecibo Message, one of the most famous messages transmitted as part of SETI, loosely translated, says: "Hi! We're intelligent! We're made of meat! Here's where we live!"
You can download the embroidery pattern at the link.
Link via Make | Photo: Evil Mad Scientist Laboratories