For some reason I just see a blank space where the video should be, so I watched it directly on youtube instead.

It's easy to get inspired by videos like this, but I can't help but think that they offer an overly optimistic vision of science. The video itself involuntarily offers a cue: one scientist is trying to find a way to feed 2 more billions of people in a world where many are already starving to death, while another has dedicated his life to fighting malaria in Africa - if he's successful, his invention is going to make the overpopulation problem worse. He might be a hero to the people he saved, but what part is he playing in the grand scheme of things?

To paraphrase Homer Simpson: "To science! The cause of... and solution to... all of life's problems."

Anyway, back on topic: am I right to assume that the energy requirements are the main limiting factor on the speed that REX can currently reach? About a month ago I shared this article, that blamed poor battery efficiency for the robots' lack of stamina, and I would expect powered exoskeletons to run into similar problems. Do you think there's any chance that we're going to get a "running machine" any time soon or are we still decades away from that?

I'd also like to know what it was like to be part of a start up, was it as stressful as they say?