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EarthSeismic Speed Traps: Iron-rich regions may slow deep-Earth vibes
Large quantities of iron-rich minerals may be responsible for the sluggishness of seismic waves traveling through certain regions deep within Earth.
By Sid Perkins -
PhysicsUniverse in Flux: Constant of nature might have changed
Researchers have found signs that one of the constants of nature has undergone a subtle shift since the universe's infancy.
By Peter Weiss -
HumansLetters from the April 29, 2006, issue of Science News
Creating a controversy The real irony of ironies is that evolution has not evolved (“Evolution in Action: The trials and tribulations of intelligent design,” SN: 2/25/06, p. 120). When even mainstream evolutionary scientists propose any change to “the fact of evolution,” they are immediately silenced.