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.
BEAT IT Crested pigeons coordinate their escapes with wing sounds rather than vocal calls. The sound production is tied to wing movement during takeoff, and thus a highly reliable alarm signal, researchers say.
HIDDEN IN PLAIN SIGHT Insects called leafhoppers (Alnetoidia alneti shown)produce microscopic, antireflective spheres that the bugs rub onto their eggs to camouflage them.
BLUE HALO Bees can easily learn to recognize a bluish tinge called a blue halo created by sloppy nanoscale structures (located in the dark center circle, and seen at right) on such flowers as Ursinia speciosa.