Springtime asteroid hit ramped up extinction rates, say scientists – The Guardian
- Springtime asteroid hit ramped up extinction rates, say scientists The Guardian
- The asteroid that doomed the dinosaurs struck in springtime CNN
- The Reign of the Dinosaurs Ended in Spring: Revelations From Bones of Fish That Died When the Asteroid Hit SciTechDaily
- The Mesozoic terminated in boreal spring Nature.com
- Asteroid That Decimated the Dinosaurs Struck in Spring Smithsonian
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