Space Science Reviews Provides an Opportunity to DebateChallenges to Long-Standing Unsolved Space Physics Problems in the 20th CenturyAkasofu, Syun-IchiAuthor informationDirector, Geophysical Institute University of Alaska, Fairbanks, P.O. Box 757320 Fairbanks, AK 99775-7320, U.S.A., Phone: (907) 474-7282; Fax: (907) 474-5882; E-mail: [email protected]Space Science Reviews 87(4):p 551-552, 1999.Copyright ©1999 Kluwer Academic Publishers