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.
SO CUTE, SO WRONG No one has a genetic way of getting rid of invasive brushtail possums (shown) in New Zealand, but now is the time to debate whether CRISPR gene drives are too strong to be considered, two researchers argue.
NOT BUNDLES OF JOY Stress may change the genetic contents of sperm by tweaking small packets of RNA in seminal fluid, a study in mice suggests.
Dennis Kunkel Microscopy/Science Source
BIG MOVES Ancient DNA indicates horse-riding pastoralists called the Yamnaya made two long-distance migrations around 5,000 years ago. One trip may have shaped Europe’s ancient Corded Ware culture, while the other launched central Asia’s Afanasievo culture.