Forty years ago, the Concorde broke the sound barrier for first time. Oct. 1, 2009— -- Bullets. Artillery. Horse whips. For a time, they all could do something humans only dreamed of: travel ...

When we talk about the speed of sound, we usually mean how fast it moves through air. But it can travel much faster through other media, and now scientists at the University of Cambridge and Queen ...

The universal speed limit of any kind of wave – be it electromagnetic or gravitational – travelling through a vacuum has been known since Albert Einstein developed his theory of special relativity in ...

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 ...

The speed of sound varies depending on the temperature of the air through which the sound moves. On Earth, the speed of sound at sea level — assuming an air temperature of 59 degrees Fahrenheit (15 ...

This seems to be the most common discussion regarding the recent Red Bull Stratos Jump. Unless you have been living under a rock lately, you have probably seen the awesome jump from 128,000 feet. Here ...

Ryan Duncan froze. He had just performed a new experiment examining common graphite—the stuff of pencil lead—but the results seemed physically impossible: Heat, which typically disperses slowly, had ...

Sprinters in the position farthest from the pistols were getting slower start times, so organizers switched to an electronic tone. When the Olympic runners take to their positions on the track later ...

On Sunday, Elon Musk said on Twitter that he plans to test a Tesla and SpaceX-branded Hyperloop pod at half the speed of sound "soon." The test's objective is to accelerate the pod to around 383 mph ...