A behavioural biologist at the State University of Campinas, Brazil, she says it's a primitive reflex common to most animals: even rats laugh.
A behavioural biologist at the State University of Campinas, Brazil, she says it's a primitive reflex common to most animals: even rats laugh.
作为巴西坎平纳斯州立大学的行为生物学家，她说笑是许多动物共有的一种原始反射：即使老鼠也会笑。