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4 results for "non-avian dinosaurs"

E_1_06 — Chicxulub Impact and the K-Pg Boundary

Approximately 66 million years ago, at the boundary between the Cretaceous and Paleogene periods (K-Pg boundary, formerly K-T boundary), a ~10 km diameter asteroid struck what is now the Yucatán Peninsula of Mexico, crea

Chicxulub K-Pg boundary Cretaceous Paleogene asteroid impact iridium anomaly

E_4_27 Verified Cataclysms & Chronology

E_4_27 — Chicxulub Impact and the K-Pg Mass Extinction

The Chicxulub impact was a catastrophic asteroid strike that occurred approximately 66.043 ± 0.011 million years ago at what is now the Yucatan Peninsula, Mexico, marking the boundary between the Cretaceous and Paleogene

Chicxulub K-Pg boundary Cretaceous-Paleogene asteroid impact iridium anomaly mass extinction

E_5_03 Verified Cataclysms & Chronology

E_5_03 — The End-Triassic Mass Extinction

The End-Triassic mass extinction (c. 201.564 ± 0.015 million years ago) was one of the "Big Five" mass extinctions in Earth's history, eliminating approximately 76% of all species and ~50% of genera, clearing the ecologi

End-Triassic Triassic-Jurassic mass extinction CAMP Central Atlantic Magmatic Province CO2

R_4_01 Biology & Evolution

R_4_01 — The Evolution of Flight: Birds, Bats, Insects, and Pterosaurs

Powered flight has evolved independently at least four times in the history of life — in insects (~350–400 Ma), pterosaurs (~230 Ma), birds (~160 Ma), and bats (~55 Ma) — making it one of evolution's most spectacular exa

flight evolution powered flight feathered dinosaurs Archaeopteryx avian evolution insect wings

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