This Pulsing DNA Nanomotor Can Power Molecular Machines. Scientists envision a tiny assembly line to build complex chemicals.

Scientists Have Finally Found the Origins of a Mysterious Asteroid

Asteroid Dust Caused 15-Year Winter That Killed Dinosaurs, Scientists Say

A seemingly subtle swap of metals—substituting a zinc ion with a cobalt ion—and a mutation ramps up the overall electric field strength at the active site of an enzyme, scientists find. The result is a predictably modified enzyme that works an astonishing 50 times faster than its unmodified analog.