Theodore Holden Posted about 1 year ago What about Dinosaurs in the future? In simplest possible terms... Weight is proportional to volume, a cubed figure, while strength is proportional to cross section of bones and muscles, basically a squared figure. Double your physical dimensions, and the factor of two gets cubed for volume and weight but only squared for cross section and strength; you'll have cut your power/weight ratio in half. That's why you don't get 200-lb gymnasts and why we no longer have sauropod dinosaurs. You can get a rough size limit for the planet by solving for the point at which one of your top heavyweight power-lifters becomes dysfunctional because of this square/cube thing, that is, by solving for the point at which just standing up becomes the same effort as a 1000-lb squat or dead-lift at his normal weight which you'd assume to be around 350, that is: 1350/(two-thirds power of 350) = x/(two-thirds power of x) You get a number around 20,000 lbs which would be a theoretical size limit for our present world. In real life the biggest elephant around 15,000 lbs and that's around 1% of elephants. That's the real world limit. 2/3 power of weight is the normal scaling factor for lifting events, i.e. it eliminates the effect of different sizes and lets you see who, amongst the champions of various weight divisions, has actually done the best lift for a particular event.