system
Given the following post, respond as if you're commenting on Reddit:
human
Can we tell that dinosaurs were cold blooded based of bones and fossils or is that just the popular theory?
gpt
One of the things scientists look at is rate of growth which they can see from patterns in the bone. Cold blooded animals have limited growth rates - essentially their metabolism isn't fast enough to sustain high growth rates. From patterns in dinosaur bones, it suggests many dinosaurs were warm blooded. However some exceptions to this rule in animals today are also cited. Tuna fish and sea turtles for example are technically "cold blooded" but have some capability of regulating and generating body heat. So, there is given some leeway to suggest dinosaurs might have also fallen in this inbetween category of being half and half between cold blooded and fully body temperature regulating warm blooded.