NASA & ESA recently announced that an American astronaut onboard the International Space Station has successfully operated a LEGO-built rover at the European Space Operations Centre in Darmstadt, Germany, using an experimental version of planet-to-planet Internet called Disruption Tolerant Networking (DTN) protocol. NASA's experts say once DTN is ready for deployment, it could be used to control robots on Mars from an orbiting spacecraft or even from Earth using satellites as relay stations.