This week the coolest team of space explorers on the planet at NASA have announced their next raging action and adventure television episode called "Space Harpoons!" - or that's what you might think if you'd not read too deeply into their press release which details not only "The Comet Nucleus Sample Return Mission," but both the fantastically powerful metal ballista and space harpoon they're currently testing out for it. Scientists at the Goddard Space Flight Center in Greenbelt, Md. are currently in early stages of testing a harpoon of epic proportions, able to collect samples of materials from the surface layers of a comet. What they're currently testing out is how hard their six foot tall crossbow will have to fire a harpoon with its 1/2 inch thick bow string to blast through enough layers of rock on the surface of the space bodies it intends to study.