Using machine-learning tools to analyze 46,000 earthquakes at The Geysers geothermal field in California, researchers discovered patterns that correspond to water-injection flows, suggesting a link to the mechanical processes that produce earthquakes. (Photo credit: Stepheng)
Schematic of silicon microresonator generating a frequency comb that samples molecules for chemical identification. —Image credit: Alexander Gaeta/Columbia Engineering
Alex Bell developed a computer program that used a traffic camera to identify how often bus and bicycle lanes were blocked by unauthorized vehicles along one block in Harlem. —Christopher Lee for The New York Times
