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Smithsonian Magazine ·Behind the news

What Was the Biggest Dinosaur? Fragmentary Fossils Make It Hard to Tell

Published 2026-05-28 14:58:30+00:00

Why are the biggest dinosaurs the hardest ones to find in one piece?

0:00 / 11:04 · Narrator Gacrux

Context

When a creature the size of a building dies, burying it before scavengers strip it bare requires a geological miracle. Published on 28 May 2026, the piece skips the usual trivia contest over which dinosaur was the absolute largest. The more interesting problem is the messy reality of the fossil record. What actually happened to a forty-ton mountain of meat when it collapsed on an ancient landscape? Ironically, the staggering scale of these giants is exactly what made them so likely to vanish without a trace.

Show notes

An examination of why paleontologists cannot definitively name the largest dinosaur, tracing the problem to the physical limits of fossilization. Because massive sauropod carcasses required extraordinary floods to bury them before scavengers destroyed their bones, scientists must estimate their size from incomplete remains. Researchers instead use limb thickness to calculate mass, though natural variation among individual animals makes crowning a single record-holder practically impossible.

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