NASA building high-tech 'comet harpoon'
A high-tech harpoon that could one day pierce a comet and bring samples back to Earth is being developed by NASA.
Source: http://www.cosmosmagazine.com/news/5096/nasa-building-high-tech-comet-harpoon
Gisele Bündchen Giuliana DePandi Giulianna Ramirez Grace Park Gretha Cavazzoni Gwen Stefani Halle Berry Hayden Panettiere