Is evolution like a well-tuned car that purrs down the road at a steady pace? Or is it more like an aging, rattling jalopy that often lurches forward? The aging jalopy is a handy metaphor for the ...

The properties of cladistic data sets from small monophyletic groups (6-12 species) are investigated using computer simulations of macroevolution. Two evolutionary models are simulated: gradualism and ...

, but in the preface to the more recent editions he admits that he would rewrite that section today as he accepts the validity of this mechanism. Finally, at least with much of biology a lot of these ...

This refers to a theory in evolutionary biology which states that the origin of a new species is usually an abrupt process that cannot always be fully traced by scientists. It is generally used to ...