mark rober

Satellite launch to help... take selfies in space
A former NASA engineer is preparing to launch a satellite that will help people take selfies in space.
NASA engineers demonstrate the effect of turning sand into water
Mark Rober, a former NASA engineer, demonstrates the fluidized effect of air pressure on the sand in the video that attracts more than 5.7 million views on YouTube, according to
The power of the world's largest water gun
A former NASA engineer built the world's largest water gun, able to fire a jet of water at 437 km / h.