Scientists are exploring new types of crystals, called topological insulators, that conduct electricity at their surface but not in their interior. The image above reveals how electrons scatter on the surface of a bismuth-based material.
Credit: Yazdani Lab/Princeton Univ.
Eruption early in human prehistory may have been more whimper than bang
Greed may breed financial fitness, but evolution allows unselfishness to survive
Fine-tuning of technique used in other animals could enable personalized medicine
Simulation suggests long-term effect on sea level not as dire as some predictions
Coverage of the 2013 American Association for the Advancement of Science meeting
The Year in Science 2012
Three-part series on the scientific struggle to explain the conscious self
Tables of contents, columns and FAQs on SN Prime for iPad