How Someone Measured the Speed of Light by Accident

At a time when many thought the Speed of Light was infinite, a few brave souls tried to come up with a definite number for it. Most of them failed. There was one guy, however, who wasn't even trying, but came up with a great way to guess. Take a look at how he took his measurement, and what it has to do with the moons… » 12/13/12 4:00pm 12/13/12 4:00pm

New experiment shows that time travel is even less likely than we…

A recent experiment stomps on the dreams of many theoretical physicists, hopeful children, and Star Trek IV fans. After a series of tests that suggested we might discover a theoretical form of time travel, scientists hit a brick wall. Or they had hit a brick wall. Or perhaps they will. Tough to get time travel grammar… » 7/27/11 6:30am 7/27/11 6:30am