Story perspectives

First Tyrannosaur Hatchlings Reveal Small Size, Large Clutches

7/15/2026

Summary

Story summary

Nick Longrich and his team identified the first tyrannosaur hatchling fossils and reported them in the journal Biology.
The hatchlings measured about 75 centimeters in length and weighed roughly 2.5 kilograms at birth.
Researchers inferred that each clutch contained 20 to 30 eggs, indicating a reproductive strategy that produced many small offspring.
The findings suggest tyrannosaurs followed an r-strategist approach rather than the intensive parental care seen in modern birds.

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Story summary

Nick Longrich and his team identified the first tyrannosaur hatchling fossils and reported them in the journal Biology.
The hatchlings measured about 75 centimeters in length and weighed roughly 2.5 kilograms at birth.
Researchers inferred that each clutch contained 20 to 30 eggs, indicating a reproductive strategy that produced many small offspring.
The findings suggest tyrannosaurs followed an r-strategist approach rather than the intensive parental care seen in modern birds.