Four-stroke engines, which make up 99% of engines on the road, need to breathe: air in during intake, sealed tight during compression and combustion, then air out on exhaust. So we need a system that ...

Add Yahoo as a preferred source to see more of our stories on Google. There aren't many technologies as ubiquitous in cycling as the Presta air valve. So it's surprising that, in the roughly 100 years ...

Last year saw the 25th anniversary of Half-Life, one of the most important games in PC history and a spectacular debut for Valve. But in another timeline, it could've been the studio's second game.

After the runaway success of the Nintendo Switch, rival gadget makers are keen to make their own handheld consoles. According to a new report, Valve is the latest to jump on the portable gaming ...

When Valve released the last of their Team Fortress 2 “Meet the…” videos last month with Meet the Pyro, they also made waves by announcing that they’d release the tools used to make the company’s ...