| 1 (7) | National Aeronautics and Space Administration * | USA |  |
| 2 (11) | Harvard University * | USA |  |
| 3 (17) | Pennsylvania State University * | USA | |
| 4 (22) | Jet Propulsion Laboratory | USA | |
| 5 (26) | California Institute of Technology * | USA | |
| 6 (28) | University of California, Berkeley * | USA | |
| 7 (31) | Stanford University * | USA | |
| 8 (32) | Lawrence Berkeley National Laboratory * | USA | |
| 9 (35) | University of Washington * | USA | |
| 10 (37) | Smithsonian Institution * | USA | |
| 11 (38) | United States Geological Survey | USA | |
| 12 (40) | University of Colorado, Boulder * | USA | |
| 13 (44) | Columbia University * | USA | |
| 14 (45) | Yale University * | USA | |
| 15 (46) | Cornell University * | USA | |
| 16 (47) | University of Texas, Austin | USA | |
| 17 (56) | Woods Hole Oceanographic Institution | USA |  |
| 18 (59) | National Center for Atmospheric Research | USA | |
| 19 (61) | Ohio State University, Columbus * | USA | |
| 20 (63) | University of Wisconsin, Madison * | USA | |
| 21 (70) | University of Michigan, Ann Arbor * | USA | |
| 22 (71) | Field Museum Natural History | USA | |
| 23 (72) | University of Illinois at Urbana-Champaign * | USA | |
| 24 (76) | Texas A&M University, College Station * | USA | |
| 25 (81) | University of Florida * | USA | |
| 26 (85) | Oregon State University | USA | |
| 27 (88) | University of Southern California * | USA | |
| 28 (99) | Indiana University-Bloomington | USA | |
| 29 (101) | United States Department of Agriculture | USA | |
| 30 (105) | University of Arizona * | USA | |
| 31 (110) | University of California, Los Angeles * | USA | |
| 32 (111) | Smithsonian National Museum of Natural History | USA | |
| 33 (116) | University of California, Davis * | USA | |
| 34 (118) | Brown University | USA | |
| 35 (127) | State University of New York, Stony Brook * | USA | |
| 36 (131) | American Museum of Natural History | USA | |
| 37 (132) | University of California, San Diego * | USA | |
| 38 (135) | University of Kansas * | USA | |
| 39 (138) | Purdue University | USA | |
| 40 (143) | University of Massachusetts, Amherst | USA | |
| 41 (152) | University of California, Santa Cruz | USA | |
| 42 (160) | University of Cincinnati * | USA | |
| 43 (171) | University of California, Riverside | USA | |
| 44 (177) | Florida State University * | USA | |
| 45 (178) | Northern Arizona University | USA | |
| 46 (196) | Virginia Polytechnic Institute and State University | USA | |
| 47 (202) | University of Utah * | USA | |
| 48 (206) | University of Nebraska, Lincoln | USA | |
| 49 (219) | Kent State University | USA | |
| 50 (235) | University of Minnesota, Twin Cities * | USA | |
| 51 (241) | University of Oregon | USA | |
| 52 (246) | Montana State University, Bozeman | USA | |
| 53 (253) | University of Connecticut, Storrs * | USA | |
| 54 (261) | University of New Mexico * | USA | |
| 55 (285) | Loma Linda University * | USA | |
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