Did you know that Earth's largest living structure isn't visible from space without help, but it's actually th

Did you know that Earth's largest living structure isn't visible from space without help, but it's actually the Great Barrier Reef, spanning over 2,300 kilometers? Even more mind-bending, this reef system is built by billions of tiny coral polyps, each no bigger than a pencil eraser. It's a true underwater city that's been under construction for roughly 500,000 years.

Feed · 22.08.2026

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