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New Mexico Fossils Reveal Thriving Dinosaurs Before Asteroid

10/24/2025

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Summary

Story summary

Fossils found in New Mexico represent some of the last dinosaurs before the asteroid struck 66 million years ago.
Researchers analyzed fossils over ten years and found a diverse ecosystem, including Alamosaurus.
The findings show the ecosystem differed from northern dinosaur populations and was thriving.
The asteroid impact caused immediate devastation and ended these dinosaurs rapidly, according to the study published in Science.

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Story summary

Fossils found in New Mexico represent some of the last dinosaurs before the asteroid struck 66 million years ago.
Researchers analyzed fossils over ten years and found a diverse ecosystem, including Alamosaurus.
The findings show the ecosystem differed from northern dinosaur populations and was thriving.
The asteroid impact caused immediate devastation and ended these dinosaurs rapidly, according to the study published in Science.