However, his report contains the assumption that lower concentrations are required for delousing than to kill humans and other warm blooded creatures; in fact, with their simpler structures and slower metabolisms, insects are more resistant to such gross metabolic poisons than mammals.
32.
The "'mammals "'are the class of vertebrate animals primarily characterized by the presence of mammary glands in the female which produce milk for the nourishment of young; the presence of hair or fur; and which have endothermic or " warm blooded " bodies.
33.
Dr . John H . Ostrom of Yale University, who has argued since the 1970s that at least some dinosaurs were warm blooded, said the Chinese specimen, which clearly seems to support his views on dinosaurs and birds, had left him " in a state of shock ."
