David Kuchta, Ph.D. has 10 years of experience in gardening and has read widely in environmental history and the energy transition. An environmental activist since the 1970s, he is also a historian, ...

Parabolic mirrors are useful for everything from solar power to telescopes to holographic projection. They're usually very difficult to make by traditional means, but this video takes a different ...

Novespace chief parabolic flight pilot explains why there are four pilots on each flight and what equipment they use to share control over the aircraft. When you purchase through links on our site, we ...