3. Mass Extinctions part 1

Earth's existence is full of dramatic events that have wiped out a huge portion of marine and terrestrial life. In this episode, we go through some of the major mass extinction events that have occurred, from asteroids and lava flows to extremely cold temperatures, the Earth has been through a lot. There is an established 'Big Five' mass extinction events, which include 1) Ordovician-Silurian (440 Ma) 2) Devonian (365 Ma) 3) Permian-Triassic (250 Ma) 4) Triassic-Jurassic (210 Ma) 5) Cretaceous-Tertiary (65 Ma) - goodbye dinosaurs. We also ask the question: are we currently going through a sixth mass extinction? In part 1 we cover the first four of these, including what are the geological time periods and should Jurassic Park be called as such. Enjoy part 1!