If you are a gearhead like us, you'll agree that one of the coolest sounds a racecar can produce, besides the exhaust note, is the high-pitched whine of a straight-cut gearbox. Most hardcore racecars ...

Forward-looking: For thousands of years, mechanical gears have driven human invention – from ancient chariots to robotic arms. Now, for the first time, engineers have built a gear that doesn't rely on ...