Here’s how hefty dinosaurs sat on their eggs without crushing them

Sitting in the center of a ring of eggs kept dinos’ weight off — and warmth near — the eggs

EGG SITTERS  Small species of oviraptorosaurs (background illustration) — dinosaurs that include birds’ ancestors — sat on their eggs, but larger species (foreground) sat in the eggless center of the clutch so as not to crush the eggs.

Masato Hattori, K. Tanaka et al/Biology Letters 2018

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