Word: backward
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...laws of physics permit time travel, even in principle? They may in the subatomic world. A positron (the antiparticle associated with the electron) can be considered to be an electron going backward in time. Thus, if we create an electron-positron pair and the positron later annihilates in a collision with another, different electron, we could view this as a single electron executing a zigzag, N-shaped path through time: forward in time as an electron, then backward in time as a positron, then forward in time again as an electron...
...downside of traveling into the future this way is that you might be stuck there. Is there any way of going backward in time? Once again, Einstein may have provided the answer. His 1915 theory of general relativity showed that space and time are curved, and that the curvature can be large in the neighborhood of very massive objects. If an object is dense enough, the curvature can become nearly infinite, perhaps opening a tunnel that connects distant regions of space-time as though they were next door. Physicists call this tunnel a wormhole, in an analogy to the shortcut...
...weapon in the hands of a young African-American male, just as the cops say they mistook Diallo's wallet for a gun. Other parents restrict their kids' clothing. New York City police detective Clifton Hollingsworth won't let his sons wear hip street fashions. No backward baseball caps or pants drooping down below their waist, because such clothing can send the wrong signals to police. "It's important that families do as much as they can to help prevent their children from getting stopped, frisked or killed," says Kenneth Meeks, author of Driving While Black, a book about racial...
...stories of train campaigning will grow with each retelling. A few political veterans recall Tom Dewey's blurting into an open mike when his train lurched backward that he must have "a lunatic engineer." The New York Times's Scotty Reston ended his account of that particular incident with this line: "And then the train took off with a jerk...
...market share; 1 American household in 5 owns a PlayStation. The next-generation PlayStation 2 sold 980,000 units in Japan in record time; a rock-star-style arrival in the U.S. is scheduled for this fall. Sony's new machine also has the advantage of being backward-compatible, meaning you don't need to throw out all your old PlayStation games...