Scientists Identify a 500-Kilogram Giant Rodent That Once Roamed South America Millions of Years Ago
The Daily Galaxy • • science
Key Points:
- Josephoartigasia monesi, the largest rodent ever identified, lived in South America between 4 and 2 million years ago and weighed around 480 kilograms, significantly larger than any living rodent today.
- The species was first described in 2008 based on a near-complete skull found in Uruguay in 1987, which had been stored in a museum before detailed examination revealed its significance.
- Biomechanical studies show J. monesi had a powerful bite, generating up to 4,165 Newtons at its molars, strong enough to break a human femur, indicating a specialized feeding strategy.
- Despite its formidable bite force, J. monesi was herbivorous, likely feeding on tough vegetation and using its incisors for digging roots and defense rather than predation.
- Its anatomy and size provide valuable insights into how rodents adapted to ecological roles typically filled by larger herbivores in prehistoric South American ecosystems.
