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 ...

This is a preview. Log in through your library . Abstract The question "Does phyletic gradualism or punctuated equilibria describe evolution through geologic time?," is fruitless to pursue, even ...

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 ...

Nearly 200 years ago, one of the great scientists of his time, Charles Lyell, published, “The Principles of Geology.” In this influential work, Lyell extended the notion that changes in the geological ...

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 ...

, 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 ...