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A Man Spotted Strange-Looking Rocks Near a Pond in Thailand. They Turned Out to Be the Bones of a Massive New Dinosaur Species
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A Man Spotted Strange-Looking Rocks Near a Pond in Thailand. They Turned Out to Be the Bones of a Massive New Dinosaur Species

Smithsonian · May 15, 2026, 2:00 PM · Also reported by 2 other sources

Key takeaways

  • Patchanop Boonsai Paleontologists in Thailand have identified a new dinosaur—and it may be the largest one ever unearthed in Southeast Asia.
  • Named Nagatitan chaiyaphumensis, the long-necked, plant-eating behemoth likely stretched more than 88 feet long and weighed nearly 30 U.S.
  • The strange specimens weren’t rocks, however, but the fossilized remains of a prehistoric giant.

Patchanop Boonsai Paleontologists in Thailand have identified a new dinosaur—and it may be the largest one ever unearthed in Southeast Asia.

Named Nagatitan chaiyaphumensis, the long-necked, plant-eating behemoth likely stretched more than 88 feet long and weighed nearly 30 U.S. tons as it lumbered around 100 million to 120 million years ago, according to a study published May 14 in the journal Scientific Reports.

The bones were discovered in 2016 in Chaiyaphum Province, located in northeastern Thailand, after a local man named Thanom Luangnan spotted some unusual-looking rocks protruding from the banks of a public pond, reports National Geographic’s Riley Black. The strange specimens weren’t rocks, however, but the fossilized remains of a prehistoric giant.

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