Cells in our bodies die all the time, and now we know just how fast. Scientists found that death travels in unremitting waves through a cell, moving at a rate of 30 micrometers (one-thousandth of an ...

A team from Los Alamos National Laboratory was able to use the microphone and a laser to calculate the speed of sound on Mars, and it's surprisingly slow. Share on Facebook (opens in a new window) ...

On one hand, the speed of light is just a number: 299,792,458 meters per second. And on the other, it’s one of the most important constants that appears in nature and defines the relationship of ...

When you're driving on land, speed is measured in either miles per hour (mph) or kilometers per hour (km/h). These measurements are straightforward because you can see stationary landmarks and ...