[The Louiswu]

Then whats with all the bones that are found? If they couldn’t lift themselves then how did the come into being? Why would they even exist and how did they get to the size we assume them to have been?

[Windflier]

If they couldn’t lift themselves then how did the come into being? Why would they even exist and how did they get to the size we assume them to have been?

The obvious logical conclusion is that our planet's gravity was much weaker in the time of the dinosaurs.

That sounds like heresy, but the fact is, these animals once existed. They could not exist in our world today, ergo, their world was fundamentally different from ours, gravitationally.

It says to me that we humans have not yet unlocked all the mysteries of our universe.

[PIF]

There is a rational and scientific explanation, but for it to be true. a lot of factors had to come together at the same time. 300 million years ago, Earth very likely had lower gravity and certainly had a far higher concentration of oxygen - such that a dinosaur living in our time would be crushed by its own weight while dying of lack of sufficient oxygen. "Another perhaps more believable theory is that during the Mesozoic, Earth had a slightly higher rotation rate which would lessen gravity slightly. More importantly the Earth's atmosphere was much thicker than today, giving more buoyancy to large animals. Slightly lower gravity, air 2/3rds that of water and very large animals become possible. "ρF = ρS (1 - 1/S.F.) where ρF is the density of the fluid, ρs is the density of the substance submerged in the fluid such as the dinosaur, and S.F is the scaling factor. "Inserting into this equation a scaling factor of 3.2 and an overall vertebrate density of 970 kg/m3, the Earth's atmospheric density during the late Jurassic period can be calculated to be 670 kg/m3. This says that to produce the necessary buoyancy so that the dinosaurs could grow to their exceptional size, the density of the Earth’s air near the Earth’s surface would need to be 2/3’s of the density of water. (ref: https://dinosaurtheory.com/solution.html)" I didn't write that but t does sound somewhat possible. Having lots of air sacks would help with the buoyancy ... bu density is another problem - once it turns to stone (fossilizes), how can you determine the real life density?