The whole thing is ecological niches. If one animal already dominates a certain ecological niche but then they die for whatever reason, they go extinct so to say, it's a big opportunity for other species to exploit that resource. So when a combination of things, the most traumatic, but not the only reason, being the meteor strike that killed off a lot of critters, us mammals had free reign to exploit those niches. So we diversified and became the dominate type of animal on Earth.
The dinosaur extinction wasn't the most severe extinction on Earth. We've had 5 major extinction events that we know of on Earth. A lot of specialists consider human expansion and the resulting excelerated species extinction caused by us to be the the sixth major extinction event.
The dinosaur extinction wasn't the most severe extinction on Earth. We've had 5 major extinction events that we know of on Earth. A lot of specialists consider human expansion and the resulting excelerated species extinction caused by us to be the the sixth major extinction event.
Everything I needed to know about life I learned on Dagobah.
