Conceptually, radar is pretty simple: send out a radio wave and time how long it takes to get back via an echo. However, in practice, there are a number of trade-offs to consider. For example, ...

The first automobile driver ever fined for speeding was Walter Arnold in England’s Kent County, circa 1896. Arnold, a Benz dealer, got caught going approximately 8 mph, well over the 2-mph limit for ...

You may soon be able to wave your hands or draw with a stylus in mid-air with these gestures then controlling everything from your Mac to an office whiteboard, thanks to radar. A new Apple patent ...