Cold Blooded, Warm Blooded, and Non-Evolution
In an amazing surprise, proclaimers of universal common descent evolution used circular reasoning. Just kidding, they frequently do that sort of thing. There is a huge gulf between warm- and cold-bloodedness, and the expensive word comes into play: thermoregulation.
If you look closely at it, you can figure out that it means that living things can keep their body temperatures within certain boundaries. There are many various methods utilized so they do not become too cold or overheated whenever possible.
Alligator and lions wanting you to pet them, both images from Pxhere |
Attempts to determine when warm-bloodedness in mammals evolved first require showing how the cold-blooded system could have evolved into the much more complex warm-blooded temperature regulating system. The contrast between warm- and cold-blooded animals is enormous, and all attempts to bridge it by some theoretical evolutionary scenario have so far failed. Temperature regulation is critical for life’s biochemistry for many reasons, especially for enzymes to function. Too cold, and enzymes work poorly if at all; too warm, and they can denature, rendering them nonfunctional. The loss of key enzyme function is lethal.
You can warm up to the rest of this cool article by clicking on "Warm-Bloodedness Not Explained by Evolution."