Explained: Near-miss asteroids
June 28, 2012What to do in the event of an asteroid streaking toward Earth? Activate the asteroid ‘fire drill.’
Explained: the Doppler effect
August 2, 2010The same phenomenon behind changes in the pitch of a moving ambulance’s siren is helping astronomers locate and study distant planets.
Explained: Linear and nonlinear systems
February 25, 2010Much scientific research across a range of disciplines tries to find linear approximations of nonlinear behaviors. But what does that mean?
Explained: The Discrete Fourier Transform
November 25, 2009The theories of an early-19th-century French mathematician have emerged from obscurity to become part of the basic language of engineering.