Was the atmopheric pressure during the age of the dinosaurs 3-5 times what it is today...

Nerd alert: Yes nerdy but very interesting and a quick read. Saw him present this at a conference a couple years back.

Major points as to why it is not the 1 bar we have today:

Giant flying dinosaurs couldn't have enough power to fly. Counter explanations explain that they were not flyers but gliders walking to the top of cliffs and soaring down.


How could a huge long necked dinosaur pump blood to its brain? Counter explanations are funny including multiple hearts, always holding their necks horizontal to the ground, or hearts located not in the chest but the neck.


He goes through calculations and all can be adjusted by changing the pressure. Interesting thoughts.

Link to article:
Was the Atmospheric Pressure Different at the Time of Dinosaurs?
http://www.levenspiel.com/octave/dinosaurs.htm

The world's largest flying creatures (included above)
http://www.levenspiel.com/octave/flyingcreatures.html

Earth's atmosphere before the age of dinosaurs:
http://pubs.acs.org/isubscribe/journals/cinnov/30/i12/html/12learn.html