Wade Hazel specializes in evolutionary analysis of decision-making in organisms; e.g. all insects in temperate zones pass the winter in a state of suspended animation, then produce multi generations in summer. Scientific term is diapause.
Twinning is a byproduct of natural selection for increased fertility as women age. He is completing a journal paper on twinning and ovulation as women age. Hazel also has done research on weapons developed by male organisms/insects, such as horns, claws, pincers, etc.