With nothing less at stake than the future of planet Earth, NASA has decided to invite ideas to detect and track asteroids that have the potential to wipe out life as we know it.After a previously undetected, 65-foot-wide asteroid exploded over Russia in February 2013, unleashing the force of 500,000 tonnes of TNT, NASA launched a series of contests for smart folks around the globe to come up with ways to keep an eye on asteroids that could threaten Earth.

read more NASA seeks help to save Earth | SBS News.