Story perspectives

Southernmost dinosaur eggs confirm high-latitude titanosaur nesting

9/9/2026

Summary

Story summary

Scientists in Argentina uncovered titanosaur egg clutches in the Chorrillo Formation, confirming high-latitude nesting.
The 255 eggshell fragments date to about 68 million years ago at 55°-60° S latitude.
These are the southernmost definitive dinosaur eggs ever discovered.
Each egg held roughly 4 liters of liquid and hatchlings weighed about 4 kg.
Nests likely formed picnic-table-size mounds that retained humidity, with heat from decomposing plant material.

1 of 1

Story summary

Scientists in Argentina uncovered titanosaur egg clutches in the Chorrillo Formation, confirming high-latitude nesting.
The 255 eggshell fragments date to about 68 million years ago at 55°-60° S latitude.
These are the southernmost definitive dinosaur eggs ever discovered.
Each egg held roughly 4 liters of liquid and hatchlings weighed about 4 kg.
Nests likely formed picnic-table-size mounds that retained humidity, with heat from decomposing plant material.