Barbara Forrest and Paul R. Gross discuss Wells' book in "Creationism's Trojan Horse". One issue they highlighted was Wells' accusation that Haeckel forged images of embryos that are allegedly still in biology books. Forrest and Gross noted that Haeckel's, "a conservative Christian youth," work was "'fudged', as biologist Massimo Pigliucci says, not 'faked'." However, "we have excellent photographs, to which students can obtain easy access. Many or most colleges students of introductory biology actually see the embryos in the laboratory . . ." Moreover, "vertebrate embryos, for most of the longest period of middevelopment, "do" look remarkably alike, pretty much, but not exactly, as Haeckel figured them in some of his drawings"(emphasis in original)."