GRAMMAR CONTEXT NATIONAL GEOGRAPHIC Meet the National Geographic Explorers and Adventurers featured in the new edition of Grammar in Context 3 Linguist K David Harrison Lesson 1, p 18 Glaciologist Lonnie Thompson Lesson 2, p 61 Photographer Paul Niclden Lesson 2, p 36 Climber Alex Honnold Lesson 2, pp 66 67 Oceanographer Sylvia Earle Lesson 2, p 54 Crisis Mapper Patrick Meier Lesson 7, pp 180 181 , S I X T H EDITION SANDRA N ELBAUM GEOGRAPHIC ~ < C E N GAG E NATIONAl I lEARNING Learning.