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The reason dinosaurs grew so large is because at the time they existed, the continents were all located close to the equator and were home to abundant supplies of edible plants, and the climate was much warmer and the atmosphere far richer in oxygen - all essential requirements for sustaining a large animal.
Originally posted by ADVISOR
Nitrogen is an essential component of all proteins. Nitrogen deficiency most often results in stunted growth.
Given that the worlds atmosphere was higher in nitrogen, it caused plants and animals of all type to be bigger.
Originally posted by SorensDespair
And I don't even know what you're talking about with the pebble/mountain comment, but I'll try to address it anyway. The reason your analogy doesn't work is because the density of a pebble and a mountain are roughly the same. The density of a neutron star and Earth are vastly different. More mass = more gravity.
F = G * (m_1 m_2)/(r^2)
Originally posted by sickofitall2012
So if this is true, then we should be able to replicate this in a lab. Just make it warmer, rich in oxygen, with lots of food and then... watch 'em grow, and grow, and grow!!!!!!!!!!