Electric cars are passé: This flying battery is the dream of every green aviatorA battery-powered aircraft with no internal combustion has been a goal of engineers ever since the Wright brothers.
Stair-climbing robot is hitting streets in FedEx delivery testThe battery-powered bot travels at 10 miles an hour, has a range of eight miles and can navigate streets, potholes, dodge pedestrians and e...
12 world-changing innovations that ended up as failuresHistory is full of failures — creations that confused, appalled, disgusted, injured or even killed people. Maybe these flops can help us.