    Sentence 1: What: popular. envitonmentalist .is  also a. university alumni member? w    Sefitence | 2! In. science, . alumni "include  astronomers ° Carl. Sagan, ~' a..... promirient  contributor” to .-the™ sciéntific” research of  extraterrestrial’ lifé, and Edwin Hubble, known  ‘for : "Hubble's Law*,. NASA’ astronaut John .M.  Grunsféld, geneticist’ James . Watson,. . best  known .as one: of the. co-discoverers of the  sstructuré of DNA, .experimental, physicist Luis  ‘Alvarez, popular environmentalist. . David  Suzuki, ‘balloorist’ Jeannette, Piccard, bidlogists  Ernest Everett ~ :