‘You know we got a lot going on. 2010′s going to be a big year,’ singer/songwriter says in Mixtape Daily.By Shaheem Reid Sean Garrett Photo: Interscope Don’t Sleep: Necessary Notables Headliner: Sean Garrett Mixtape: The Pen: Vol. 1 Key Collaborations:...

When the charts were first changed to include download sales, certain cultural commenters thought this would be bad news. They fretted that most songs would appear one week, then disappear the next, because they’d been on a popular TV show or something. Or that old, popular acts like...

It’s easy to find a dictionary definition of “time.” But ask a group of theoretical physicists and the answer isn’t as clear. Sean Carroll of CalTech discusses the mysteries of time in his book, From Eternity to Here: The Quest for the Ultimate Theory of Time. »...