a side effect of warm-bloodedness was that mammal brains could operate much faster than fish or reptile brains. This made it possible to perform substantially more complex computations. This is why reptiles, despite their long-range vision on land, were never endowed with the gift of simulating. The only nonmammals that have shown evidence of the ability to simulate actions and plan are birds. And birds are, conspicuously, the only nonmammal species alive today that independently evolved warm-bloodedness.
