Variable valve timing and variable valve lift may sound similar, but they're entirely different. Here are the differences between them and how they work.

Almost all gasoline engines, whether they're efficient-yet-less-refined four-cylinders, high-horsepower V6s, or growly and torque-rich V8s, use much the same process to create power. The "Otto cycle" ...

Team Fortress 2 maker Valve has handed over the game's full client and server code to fans.