# @stem_antics on Instagram

- **Type:** Video
- **Original URL:** https://www.instagram.com/p/DYFYRoiAK42
- **Gondola URL:** https://gondola.cc/posts/65199734-stem-antics-instagram
- **Thumbnail:** https://img.gondola.cc/tr:w-,h-,fo-auto/postThumbnails/60d657b649.jpg
- **Posted:** 2026-05-08T16:17:45.000+00:00
- **Account Owner:** Stem Antics (@stem_antics) — https://gondola.cc/stem_antics

## Caption

A recent excavation update from the Burke Museum revealed something incredible hidden inside a hadrosaur skeleton: ossified tendons — tendons that gradually mineralized and hardened into bone-like structures over the dinosaur’s lifetime. 

These aren’t random fossil fragments. They’re part of a highly organized biological support system that helped stabilize massive dinosaur tails over 66–75 million years ago.

Hadrosaurs (“duck-billed dinosaurs”) are especially famous for these structures. In many species, paleontologists find long rod-like tendons arranged in a crisscross lattice along the tail and back. This pattern likely acted like an internal engineering framework — similar to reinforced steel bars (“rebar”) inside concrete. 

Why does this matter?

🦖 It changes how we think dinosaurs moved.
For decades, scientists debated whether dinosaur tails dragged on the ground. Fossils like these show many hadrosaur tails were actually stiffened and elevated, helping with balance and locomotion. The tail likely functioned as a dynamic counterweight while the animal walked or ran. 

⚙️ It reveals advanced biomechanical adaptations.
The arrangement of ossified tendons may have stored and released elastic energy during movement — almost like a spring system. That means these giant herbivores may have moved more efficiently than we once imagined. 

🧬 It helps scientists study dinosaur growth and evolution.
Microscopic analysis of these tissues shows similarities between dinosaur tendon mineralization and processes seen in modern birds like turkeys. Since birds are living dinosaurs, these fossils help bridge ancient and modern anatomy. 

🪨 It demonstrates extraordinary fossil preservation.
Soft tissues almost never fossilize directly. But under the right conditions, collagen-rich tendons can mineralize and preserve their structure for tens of millions of years. Hadrosaurs are especially known for preserving skin impressions, tendon structures, and even “mummified” tissue traces. 

#STEM #Paleontology #Dinosaurs #Fossils #Hadrosau

## Stats

- **Views:** 7,913
- **Likes:** 316
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- **Comments:** 10

## Tags

fossils, hadrosau, stem, paleontology, dinosaurs

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