These Mysterious Mounds in South America Are Made of Worm Poop
Regularly spaced and densely packed, these mounds can reach up to 6 feet tall and 16 feet wide. Now researchers have found that surales true architects are gigantic earthworms that reach 3 feet in length. These earthworms, belonging to the genusAndiorrhinus, are the largest earthworms found in the area. An aerial view of the tropical wetlands showing hundreds of mounds. Living in the waterlogged pits between mounds, theAndiorrhinusworms have developed some unique eating habits....