Argentinosaurus: A Giant of Uncertain Exact Mass

Argentinosaurus is one of the largest known dinosaurs and land animals. Its fossil remains are highly incomplete, however, so size and mass are estimated from fragments and comparisons with other sauropods. Scientific estimates often fall roughly in the 60–90-tonne range; some early or broader estimates reached 100 tonnes or more. This is not a direct weighing, so “over 100 tonnes” is possible but uncertain.