These hearings focused on the impact of the United States decision to leave the United Nations Educational, Scientific and Cultural Organization (UNESCO). Included are prepared statements and/or testimony by: Congressman Jim Leach (Iowa); Jean Gerard (U.S. Ambassador to UNESCO); Paul Baker; William Nierenberg; Thomas Galvin; and A. K. Solomon. Also included in appendices are: (1) additional letters submitted for the record; (2) a U.S. interagency perspective (National Science Foundation) on the natural sciences in UNESCO; (3) a report titled "UNESCO Science Programs: Impacts of U.S. Withdrawal and Suggestions for Alternative Interim Arrangements;" and (4) a report (by Genevieve Knezo and Michael Davey) entitled "Science and Technology Programs in UNESCO: A Description of the Programs and Preliminary Analysis of the Policy Implications of U.S. Withdrawal for Science." This latter report describes the rationale for the U.S. decision to withdraw from UNESCO; UNESCO's science and technology activities; scientists' reactions to and criticisms of the decision to withdraw; the policy implications of withdrawal for science; and issues related to developing program alternatives to UNESCO's science activities. (JN)