Rachel Mayberry is Professor of Linguistics at the University of California, San Diego, where she is affiliated with the Center for Research on Language, the Center for Human Development, and the Joint Doctoral Program in Language and Communicative Disorders. Her research has yielded key insights into the nature of the critical period for language some of which have been published in Nature. Her work on co-speech gesture has been pioneering, including the discovery that gesture complexity is tightly linked to syntactic complexity in bilingual acquisition and fluency disorder. She is co-editor of Language Acquisition by Eye, an influential work setting the framework for research into sign language acquisition and the linguistic bases of reading development.She received her Ph.D. from McGill University where she was on the faculty for many years and served as Director of the School of Communication Sciences and Disorders in the Faculty of Medicine. She was recipient of a new investigator award from NIH and has since received multiple research grants for her work in Canada and the USA. She directs the Laboratory for Comparative Language Acquisition at UCSD.