How come dinosaurs like the titanosaur grow to such large size, when animals like the elephant cant grow larger due to the square cube law?

Question

As far as i know, there arent bigger animals around today due to the square-cube law, and yet their were dinosaurs the size of whales on land?

In: 906

Answer 1

I can be totally wrong about this, but if my memory serves me right, the oxygen-content of the air was much higher in the times when the dinosaurs lived. Which meant that they had an easier time getting out enough oxygen to the muscles in their huge bodies, which allowed them to grow larger. In addition to the already mentioned fact that they had hollow bones etc. and were not as heavy as one might think.