"In Darwin's Black Box (1996) and again in The Edge of Evolution (2007), Michael Behe challenged the scientific community to explain irreducibly complex molecular machines, like the cilium and bacterial flagellum, in Darwinian terms. The eukaryotic cilium, especially, represented "irreducible complexity squared," he said, with further research showing a complex transport system, Intraflagellar Transport (IFT), acting like a system of "freight cars" at a "construction site," moving cargo up and down the cilium with forward and reverse motors. His first literature search in 1996 showed "only a few attempts" to Darwinize the cilium. By 2007, nothing had changed
Now, a team of scientists in the Netherlands has sent another contender into the ring. In an open-access paper in PNAS, "Evolution of modular intraflagellar transport from a coatomer-like progenitor," Tuenis van Dam and six others make audacious claims in the introduction and again in the conclusion."