Top-ratedS1.E1 ∙ Death RaysWed, Feb 11, 2009What caused the Ordovician extinction event 450 million years ago, the second-largest of the five major extinction events in Earth's history.7.4/10 (15)Rate
Top-ratedS1.E2 ∙ Hell on EarthWed, Feb 18, 2009What caused the Devonian extinction event 370 million years ago, one of five major extinction events in the history of Earth.7.8/10 (16)Rate
Top-ratedS1.E3 ∙ DoomsdayWed, Feb 25, 2009K/T extinction event. What was it like on the fateful apocalyptic day 65 million years ago when the asteroid that led to the extinction of dinosaurs arrived and hit Earth?7.5/10 (14)Rate
Top-ratedS1.E4 ∙ Panic in the SkyWed, Mar 4, 2009K/T extinction event. What was the last year of dinosaurs' existence on Earth like?7.8/10 (15)Rate