Macroevolution of major clades is often studied by plotting their taxonomic diversity through time. It is equally informative, but less commonplace, to investigate how clades explore anatomical βdesignβ space by...
Sadly, we donβt have time machines that would permit us to go back and see ancient evolution in action. So we have to make do with such devices and stratagems as inference, surmise, speculation, good honest-to-goodness...