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Dinosaurs Thrived in New Mexico 400K Years Post-Asteroid

10/26/2025

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Summary

Story summary

A new study finds dinosaurs in New Mexico thrived within 400,000 years of the 66-million-year asteroid impact.
Fossils come from the Naashoibito Member of the Kirtland Formation, anchoring the study in this location.
The findings show diverse ecosystems with Alamosaurus coexisting with other dinosaurs.
Experts caution the evidence comes from a single location and may not reflect broader North American trends.

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Story summary

A new study finds dinosaurs in New Mexico thrived within 400,000 years of the 66-million-year asteroid impact.
Fossils come from the Naashoibito Member of the Kirtland Formation, anchoring the study in this location.
The findings show diverse ecosystems with Alamosaurus coexisting with other dinosaurs.
Experts caution the evidence comes from a single location and may not reflect broader North American trends.