David Brewster was one of Scotland's top scientists, who pioneered optical minerology and made significant advances in optics more generally. He also invented the kaleidoscope. However, he was also a devout Christian and prominent early critic of Darwin.
Despite being a highly qualified physicist, he wasn't an expert on biology. But that didn't stop him piling into the debate on evolution. He attacked Robert Chambers' Vestiges of the Natural History of Creation and wrote a critical review of Darwin's On the Origin of Species under the title "The Facts and Fancies of Mr Darwin".