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The discovery (phát hiện) of an enormous (khổng lồ) network of more than 200 million termite mounds, some of them about 4,000 years old, is like finding an "undiscovered wonder (kỳ quan) of the world," according to the lead researcher with the team that found it.

"The first time I was there, it's just unbelievable. You just cannot believe what you're looking at," said Stephen Martin, a social entomologist and professor at Salford University in the U.K.

The mounds were discovered in a remote (xa xôi) forest (khu rừng) in northeastern Brazil, stretching across an area the size of Great Britain. They can be seen from space (có thể nhìn từ không gian).

They're all roughly 10 feet high, 20 feet wide at the base and spaced at 30 or 40 foot intervals.

Martin first noticed the mounds in 2004, while he was researching the decline of honey bees in the region.

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