Several species of longwing butterflies are discovered to be hybrids.

Hybridization among wood warblers suggests “filling the earth” through dispersal, speciation and adaptation to local habitats.

During one of my frequent visits to the office of my high school headmaster, his individual tutelage yielded a life lesson that I’ve never forgotten. His exact words were, “You think you’re right!” Of course I thought I was right, wouldn’t anyone who thought they were wrong change their mind and then immediately think they are right? Now that I’m an adult biologist, I still think that I’m right. Inevitably…

Many kinds of animals appear designed for predation and violence, in contrast to what one would expect based on the biblical description of Edenic peace. It seems that animal species must have changed in major ways since the creation, but is this idea compatible with biblical teachings? Many people have asked this question, wondering whether changes in species point to evolution rather than creation.…

Studies of species in the sixteenth century began with numerous suggestions of wide variability, but after Francesco Redi helped to falsify spontaneous generation, scholars began to view species as essentially fixed. Published in Origins, n. 62.

The idea that different types of organisms were created and commanded to reproduce "after their kinds" seems widely believed among creationists. It may therefore come as a surprise to many to learn the idea is not stated in the Bible. Published in Origins n. 60.

A review of the book, Beginnings: Are Science and Scripture Partners in the Search for Origins? Published in Origins n. 60.

Thirteen biological phenomena are discussed in conjunction with evolution, creationist theories of diversification, and the hypothesis that transposable elements may produce rapid change in species. Published in Origins n. 54.

The subtribe Flaveriinae is a group in the sunflower family. This group of plants appears to have diversified from a single ancestral species after the flood. Published in Origins n. 52.