Should we be surprised if Neandertals, Denisovans, and modern humans didn’t form stable hybrid zones?
A geneticist asks why we don't see more persisting hybrid populations, and I find an answer in the theory of population source-sink dynamics.
Reviewing a body of evolutionary theory that tries to understand the ultimate success of some invasions after a lag.
The dynamics of adaptation in shrinking populations may help understand how many ancient populations evolved.
Looking critically at a story used to illustrate the process of natural selection.