A Japanese defence researcher has invented a spherical observation drone that can fly down narrow alleys, hover on the spot, take off vertically and bounce along the ground.
The US Navy announced a successful test Friday of an electromagnetic cannon capable of firing a projectile 110 nautical miles (200 kilometers) at five times the speed of sound.
A U.S. graduate student won second place in a "Greener Gadgets Conference" competition inventing a floor lamp powered by gravity.
Ah, the cool, refreshing feel of air conditioning on a sweltering summer day. Ugh, the discomfort when those energy bills in July, August and September come due — $200, $400, $600 or more.