build laboratory tools from waste. Hauser continued to work as a researcher and priest until his death on March 30, 2004. Work While working in Innsbruck, Hauser developed a new histological technique that eliminated the use of xylene, a toxical compound that facilitated paraffin infiltration in tissues to be sectioned, by replacing it with isopropyl alcohol, an almost unharmful substance. Most of Hauser's academic research was dedicated to the study of the diversity, anatomy, physiology and behavior of planarians. Selected works References 1920 births 2004 deaths Jesuit scientists 20th-century Hungarian zoologists Hungarian expatriates in Brazil