Alvarez hypothesis

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1	Decades of Discovery[removed]Why Dinosaurs Are Extinct Add to Reading List Source URL: www.osti.gov Language: English - Date: 2011-07-12 16:24:27 Planetary science Extinction events Climate history Dinosaurs Cretaceous Iridium Walter Alvarez Cretaceous–Tertiary extinction event Alvarez hypothesis Geologic time scale Phanerozoic Historical geology
2	Microsoft PowerPoint - _LauraDelgadoLopez.pptx Add to Reading List Source URL: solarsystem.nasa.gov Language: English - Date: 2013-04-11 13:56:00 Impact event Planetary science AG5 Risk Tunguska event Asteroid Comet Alvarez hypothesis McCurdy Astronomy Space Management