Bowers Museum presented the exhibition in partnership with London's Royal Geographical Society. Advisory work An honorary research associate of the Institute of Economic Botany of the New York Botanical Garden, he is a Fellow of the Linnean Society, a Fellow of the Explorer's Club, a Fellow of the Royal Geographical Society, and a Fellow of the Royal Canadian Geographical Society. Davis was a founding board member of the David Suzuki Foundation and completed a six-year term on the board of the Banff Centre, a Canadian institution for the arts. He has served on the board of directors since 2009 for the Amazon Conservation Association, whose mission is to conserve the biological diversity of the Amazon. In 2009, he delivered the CBC Massey Lectures, Canada's most prestigious public intellectual forum. He is a member of the International Advisory Board, Hunt Consolidated, PLNG, and has also been engaged in Journey to Zero, a three-year campaign sponsored by Nissan and TBWA to support zero emission vehicles. Criticisms of work in Haiti In 1983, Davis first advanced his hypothesis that tetrodotoxin (TTX) poisoning could explain the existence of Haitian zombies. This idea has been controversial and his 1985 follow-up book (The Serpent and the Rainbow) elaborating upon this claim has been criticized as containing a number of scientific inaccuracies. One of these is the suggestion that Haitian witchdoctors can keep "zombies" in a state of pharmacologically induced trance for many years. As part of his Haitian investigations, Davis commissioned the exhumation of a recently buried child. (Dead human tissue is supposed to be a part of the "zombie powder" used by witchdoctors to produce zombies.) This has been criticized in the professional literature as a breach of ethics. The strictly scientific criticism of Davis's zombie project has focused on the claims about the chemical composition of the "zombie powder". Several samples of the powder were analyzed for TTX levels by experts in 1986. They reported that only "insignificant traces of tetrodotoxin [were found] in the samples of 'zombie powder' which were supplied for analysis by Davis" and that "it can be concluded that the widely circulated claim in the lay press to the effect that tetrodotoxin is the causal agent in the initial zombification process is without factual foundation". Davis's claims were subsequently defended by other scientists doing further analyses, and these findings were criticized in turn for poor methodology and technique by the