Week 3, Day 2

I have a bit of time today before class so I am going to talk about dinosaurs. Dinosaurs are awesome, they are so massive and interesting and bad-ass. Since the earth had so much more oxygen back then there lungs allowed them to grow to massive proportions which is great because bigger is better right? That makes me wonder, what if there was a bunch of oxygen at this time period? Would we grow to be huge and massive? These type of things make me wonder at night. Or if we went to a different world with more oxygen would the people on that planet evolve into larger humans?