Einstein’s claim that the speed of light is constant has survived more than a century of scrutiny—but scientists are still daring to test it. Some theories of quantum gravity suggest light might ...

The best turtleneck sweaters for men are a serious bit of knitwear business. No other sweater keeps your neck quite as warm—or eliminates the need for a scarf entirely. But warmth is only half the ...

How much speed do you actually need for an internet connection? Most of us don't necessarily require the fastest (and most expensive) tier of broadband service that our providers offer, but oftentimes ...