A boomerang can execute its unique roundtrip flight by making use of three fundamental physics principles: lift, relative velocity, and gyroscopic precession.
years ago by helios28
in category: science Comments (0)
A Chinese farmer who lost his hands in an accident turns misfortune into a family enterprise with home-made bionic arms that he now sells to other amputees.
years ago by boyt
in category: fascinating Comments (1)