Brachiosaurus

📖 1. Overview

With forelimbs longer than its hindlimbs and a head height reaching 13 m (4–5 stories of an apartment building), it was a representative giant sauropod of the Jurassic.

🌐 Wikipedia Summary Extract

Brachiosaurus is a genus of sauropod dinosaur that lived in North America during the Late Jurassic, about 155.6 to 145.5 million years ago. It was first described by American paleontologist Elmer S. Riggs in 1903 from fossils found in the Colorado River valley in western Colorado, United States. Riggs named the dinosaur Brachiosaurus altithorax; the generic name is Greek for "arm lizard", in reference to its proportionately long arms, and the specific name means "deep chest". Brachiosaurus is estimated to have been between 18 and 22 meters long; body mass estimates of the subadult holotype specimen range from 28.3 to 46.9 metric tons. It had a disproportionately long neck, small skull, and large overall size, all of which are typical for sauropods. Atypically, Brachiosaurus had longer forelimbs than hindlimbs, which resulted in a steeply inclined trunk and a proportionally shorter tail.

🦴 2. Anatomy & Morphology

Pneumatic cavities connected to air sacs were well developed inside its neck and back vertebrae, reducing bone weight and maximizing respiratory efficiency.

🔍 3. Fossil Record & Paleoecology

It walked across the Jurassic plains consuming hundreds of kilograms of conifer leaves each day.

🇰🇷 4. Connection to Korea

It belongs to the same lineage as the trackmakers of the giant sauropod footprint fossils found in Goseong, Haenam, and Uiseong on the Korean Peninsula.