The Signal — 2026-07-02 breakpoint #3
Now for a story that sounds like science fiction but is, in fact, science fact. Researchers at the University of Amsterdam have discovered that sun-powered sponges may generate up to 11% of tropical coral reef productivity. Sponges, which we generally think of as passive filter feeders, are apparently harnessing sunlight. They harbor symbiotic algae that photosynthesize, turning sunlight into energy. And not just for themselves—they share it with the reef. So, while you're worrying about your 401k, sponges are running a solar-powered cooperative under the sea. It's a reminder that nature's ingenuity often outpaces our own. And it's happening right now, just below the waves.