Jason Zweig writes The Intelligent Investor column every weekend for The Wall Street Journal. He also writes a weekly newsletter of the same name. Jason is the author of “Your Money and Your Brain,” ...

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Aug. 24, 2025 — Ripple bugs’ fan-like legs inspired engineers to build the Rhagobot, a tiny robot with self-morphing fans. By mimicking these insects’ passive, ultra-fast movements, the robot gains ...