Thread:BastionMonk/@comment-28675190-20160618142448/@comment-26923065-20160618155904

The most likely theory on the extinction of non-avian dinosaurs (Cretaceous–Paleogene extinction event) is that an asteroid with a diameter of 180 metres struck Earth in the Gulf of Mexico. This caused various effects such as an impact winter (an asteroid releasing enough ash and dust into the atmosphere to block out sunlight), and natural disasters (Eg. Earthquakes and Tsunamis). Some scientists would disagree and have theories that revolve around volcanic eruptions, climate change, and/or sea level change. Some unlikely theories would include the obvious aliens.