There are a few common rules about bear safety everyone should know. One key rule? Never run away from a bear. In addition to putting on bursts of speed up to 40 mph, some bears can sustain speeds of ...

How fast can a human run 26.2 miles? The previously imponderable 2:02 was just seconds away, and the 2-hour marathon was being discussed in reverential terms once used for the 4-minute mile: A barrier ...

Humankind was once determined to break the sound barrier, as it was considered the ultimate achievement in speed. But our technology didn't stop there, as we've built experimental vehicles that can ...