An ancient termite mega city in Brazil_ a colony that_s estimated to be 4_000 years old and covers a

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00:00Nests, they're waste dumps for a truly monster tunneling project.

00:05A termite megacity the size of Great Britain.

00:09It dwarfs any city that humans have ever built.

00:14It's mind-boggling.

00:16Analysis suggests that every year the insects here excavate over 50 million tons of soil.

00:22The amount that's been moved around to build these tremendous mounds is the equivalent of 4,000 Great Pyramids of Giza.

00:31This is a huge structure built by tiny insects.

00:36Soil analysis confirms some of these insect mounds are 4,000 years old.

00:42Built more than 2,000 years before the rise of the Roman Empire.

00:45And the excavation that produced them is the most extensive bioengineering effort by a single insect species anywhere on the planet.