Having garnered more than 3.5 million viewers, a TED talk featuring Penn Engineering professor Vijay Kumar on the making of flying autonomous robots by Penn’s General Robotics, Automation, Sensing and Perception Lab, has become one of the most watched TED videos to date.

TED, which stands for technology, entertainment and design, is a non-profit organization started in 1984 as a way to generate discussion about innovative ideas. TED holds conferences featuring compelling speakers, and posts videos of those speakers on its website. To watch the video, go to www.ted.com and search for “Quadrotors.”