Saturday Night Fever: you may remember the dance performed by John Travolta and Karen-Lynn Gorney to the Bee Gees song (1) ...

The motion of any object is relative. On Earth we tend to ignore that, because the vast background of the ground gives us a seemingly fixed and absolute frame of reference. Sitting comfortably at our ...

Nuclear physicists proposed a method to measure the speed of sound characterizing matter created in nuclear collisions. Heavy nuclei consist of hundreds of protons and neutrons (belonging to a group ...

Here on land, the speed of a vehicle is recorded in either miles per hour or kilometers per hour. In either case, determining how fast you're moving on land is fairly simple because you can see ...

Corrections & clarifications: A previous version of the story misstated a measurement of Internet speed. We know what “slow” internet is like: videos buffer, downloads lag and a single page can take ...