Use one of these whether you want to spend more time in the gym or quality time with your family. Lindsey Ellefson is Lifehacker’s Features Editor. She currently covers study and productivity hacks, ...

I’m an eternal student of cars, and take every opportunity to learn something new about them, particularly about the nuts and bolts of driving them fast and/or sideways, any chance I can get. I’ve ...

Several dominoes have fallen so far in Week 16 with respect to the NFL’s playoff picture. The Cowboys have been eliminated while the Patriots, Seahawks, Bears, Eagles and 49ers have locked in a ...

Abstract: Order tracking (OT) is an effective fault diagnosis method for rotating machinery under variable speed conditions. Accurate instantaneous frequency (IF) is the premise of this method. In ...