Tongnanlong zhimingi: New 92-foot China dinosaur challenges isolation theories.

• A new dinosaur species, Tongnanlong zhimingi, discovered in southern China, could be one of Earth's largest land animals.
• The fossil, found in the Tongnan District, suggests the dinosaur may have reached 23 to 28 meters in length.
• Analysis of the Tongnanlong zhimingi fossil, published in Scientific Reports, indicates it is a mamenchisaurid, possibly the largest of its group.
• The discovery challenges theories of East Asian dinosaur isolation, suggesting mamenchisaurids were globally distributed during the Jurassic period.
• The 147-million-year-old fossil includes limbs, vertebrae, and a 1.8-meter shoulder blade, revealing adaptations for extreme size.

Why It Matters: New giant dinosaur challenges size records and global migration theories.