AMA | October 2024

9011.785 - 9035.722 Sean Carroll

They're just not going out of their way to heat themselves. Cold-blooded organisms respond more dramatically to changes in the environmental temperature than warm-blooded organisms do. So maybe for some reason it's just not worth it for them to put those resources into that particular homeostatic maintenance. The other thing to keep in mind is that organisms are not intelligently designed, right?