 In 2003, he wrote a lengthy paper about the evolution of flagella and has continued to challenge claims from intelligent design proponents that flagella are irreducibly complex.He co-authored a critique of Stephen C. Meyer's paper that became important in the Sternberg peer review controversy.He also wrote a chapter-by-chapter critique of Jonathan Wells' book "Icons of Evolution", which he described as a "travesty of the notion of honest scholarship" that is "shot through with misrepresentations."