It is inherent in any definition of science that statements that cannot be checked by observation are not really saying anything or at least they are not science.

The fact -- not theory -- that evolution has occurred and the Darwinian theory as to how it occurred have become so confused in popular opinion that the distinction must be stressed.

Splitting and gradual divergence of genera is exemplified very well and in a large variety of organisms.

It is inherent in any definition of science that statements that cannot be checked by observation are not really saying anything or at least they are not science.

I have a debt, a loyalty to the museum; the best place for me to do what I wanted to do.

It remains true, as every paleontologist knows, that most new species, genera, and families, and that nearly all categories above the level of families, appear in the record suddenly and are not led up to by known, gradual completely continuous transitional sequences.

The meaning that we are seeking in evolution is its meaning to us, to man. The ethics of evolution must be human ethics. It is one of the many unique qualities of man, the new sort of animal, that he is the only ethical animal. The ethical need and its fulfillment are also products of evolution, but they have been produced in man alone.