Search and Discovery
By measuring hundreds of periodically varying stars out to 80 million light‐years, the Hubble telescope has calibrated much brighter cosmological yardsticks that we can see billions of light‐years away.
As geochemists, modelers, and seismologists try to make sense of data from Earth's mantle, a new model poses challenges to each group and suggests that progress in understanding the deepest regions of the mantle can occur only on a broad front.
The traditional Copenhagen orthodoxy saddles quantum theory with embarrassments like Schrödinger's cat and the claim that properties don't exist until you measure them. The consistent‐histories approach seeks a sensible remedy.
Chaotic dynamics in real systems does not provide finite relaxation time to equilibrium or fast decay of fluctuations, and chaotic systems are not completely random in the sense originally postulated for statistical systems. These properties may require rethinking some of the fundamental assumptions of thermodynamics.