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.
Footprints left in volcanic ash that
fell in central Mexico’s ValsequilloBasin
about 40,000 years ago are evidence that humans have inhabited the Americas
far longer than previously confirmed, a new study suggests.