In a 1998 piece at the Population Research Institute, Palmer reiterates the common myth that climate has changed before, hence man - made climate change need not be worried about (he goes on to cite climate
change deniers Sallie Baliunas, Richard Lindzen, Robert Balling, Roy W. Spencer, and Patrick J. Michaels in his defense): [16], [17]
Mother Jones reported that one such article was written by climate
change deniers Willie Soon and
Sallie Baliunas, which concluded «the 20th century is probably not the warmest nor a uniquely extreme climatic period of the last millennium.»