In NASA We Truss Early airplanes were a mess. Human flight was new, and as technology moved from “a barely functioning jumble of cloth, wire, and engines” to “deadly war machines” in less than a decade,
Engaging your mind is the best way to keep it sharp, but in the hustle and bustle of daily life, it’s easy to fall into a slump. If you need a mental pick-me-up, check out these fascinating TED Talks.
These are like no magnets you've ever seen before. We all know the basics of magnets. They have a north pole and a south pole, and like poles repel while the opposites attract. Simple! Those basic facts