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 ...

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 ...

In the summer of 1926, an experimental beam of light pierced the night sky between two precisely measured peaks in the San Gabriel Mountains, and science history was made. Virtually unseen by the ...

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 ...

Two speed measuring devices used by the law enforcement community -- the down-the-road radar with which officers enforce automobile speed limits and the ballistic chronograph which tracks the velocity ...

Researchers have devised a revolutionary new technique for measuring the microscopic elasticity of materials. Known as SRAS, the technology works by measuring the speed of sound across the material's ...