NASA Sent a Stamp 3 Billion Miles to Pluto on New Horizons

(via mental_floss) In 2006, NASA placed a 1991 postage stamp inside the New Horizons spacecraft before sending it off to explore the outer reaches of the solar system. Yes, despite the cost of international shipping, 29 cents can get your stamp all the way to Pluto. That “Pluto: Not Yet Explored” stamp officially became the world’s farthest-traveling stamp when New Horizons flew by the dwarf planet nine and a half years later, zooming 3 billion miles away from Earth, according to Guinness World Records—not that there were a whole lot of candidates.