The New York Times Magazine interviewed Jacquelyn Gill, an associate professor of terrestrial paleoecology at the University of Maine, on controversy surrounding the Younger Dryas impact theory, which claims that a comet struck the Earth 12,900 years ago and caused a sudden cooling widespread death among large, ancient mammals. Gill said she was doubtful of it read more NYT Magazine interviews Jacquelyn Gill on Younger Dryas impact