So when is this old enough to know better supposed to kick in shirt
It’s called convergent evolution and So when is this old enough to know better supposed to kick in shirt basically the same phenomenon that gives us birds/bats and dolphins/sharks. There’s only so many good body types for getting around in the air and the water. Or for providing a solid exoskeleton for that matter.
Best So when is this old enough to know better supposed to kick in shirt
It’s a matter of physics and Darwinian principles. There are only so many combinations of only so many elements. Some environments demand certain features. Certain shapes perform certain functions better than others.
Consider that biochemistry usually only works in a So when is this old enough to know better supposed to kick in shirt temperature and pH range. A hot, dry environment will be more likely to yield creatures with long, skinny limbs such as cheetahs, camels, giraffes. Sometimes you get an elephant or rhino, but so many creatures end up with similar adaptive features.