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.
SQUEEZE PLAY This weird new metamaterial achieves the counterintuitive feat of expanding when squeezed.
J. Qu, Muamer Kadic and Martin Wegener
BLACK HOLE BOUNTY Gravitational waves have been spotted from two merging black holes (illustrated above), the fifth reported detection.
Mark Garlick/Science Photo Library/Alamy Stock Photo
SWINGING BRIDGE When it first opened, crowds on the Millennium Bridge in London (shown) caused the bridge to sway wildly. Scientists have made improved simulations to determine the conditions that lead to such wobbly bridges.