In the Nov. 25 SN: Charting lumpy space, Bronze Age movers and shakers, T. rex’s slasher arms, gene editor corrects typos, the Great Pyramid hides a void, mosses chronicle Arctic warming, an itty-bitty insect-inspired robot and more.
Evidence hierarchies, one version shown, classify types of studies according to the strength of evidence they provide. But a recent paper challenges the assumptions behind these hierarchies.
WATCH OUT The Asian tiger mosquito (shown) is an unloved invader in much of the world, but now a bad-dad version is about to be commercially launched as a living tool to control populations of the pests.
GUN WOUND BURDEN A new study estimates there were roughly 25 visits to the emergency department for gun-related injuries per 100,000 people from 2006 to 2014.