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Pick two dinosaurs to see them side by side. Ranges are shown as published; missing values say Unknown.

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Drawn to one scale, overlapping on a shared ground line, with a 1.8 m human on the right. Brachiosaurus altithorax: length unknown · 4 m hip height. Argentinosaurus huinculensis: 35 m long · 5 m hip height (approximate silhouette).Silhouette approximated from Dreadnoughtus schrani (no silhouette of Argentinosaurus huinculensis available).Silhouettes: Brachiosaurus altithorax · Michael P. Taylor, CC0 1.0, via PhyloPic · CC0 1.0; Argentinosaurus huinculensis (from Dreadnoughtus schrani) · Scott Hartman, CC BY 3.0, via PhyloPic · CC BY 3.0; Human · Cagri CEVRIM · CC0 1.0

Charles Nye, CC BY-SA 4.0, via Wikimedia Commons (unmodified except resizing) · CC BY-SA 4.0

Brachiosaurus altithorax

Period: Jurassic· Kimmeridgian
Age: 154.8–145 Ma
Diet: Herbivore
Length: Unknown
Height: 3.8–4.4 m
Mass: 28.7 t
Found in: Morrison Formation, Colorado, United States
Classification: Dinosauria › Saurischia › Sauropodomorpha › Sauropoda › Macronaria › Brachiosauridae › Brachiosaurus › Brachiosaurus altithorax
Year described: 1903

TotalDino, CC BY 4.0, via Wikimedia Commons · CC BY 4.0

Argentinosaurus huinculensis

Period: Cretaceous· Cenomanian
Age: 100.5–89.8 Ma
Diet: Herbivore
Length: 30–35 m
Height: 4.8–5.5 m
Mass: 65–83 t
Found in: Huincul Formation, Neuquén Province, Argentina
Classification: Dinosauria › Saurischia › Sauropodomorpha › Sauropoda › Macronaria › Titanosauria › Argentinosaurus › Argentinosaurus huinculensis
Year described: 1993