Unit 1
Text A Galileo and Aristotle 1
Contents 1
Unit 2
Unit 3
Unit 4
Unit 5
Unit 6
Unit 7
Unit 8
Unit 9
Text B Schweitzer 10
Unit 10
Unit 11
Unit 12
Unit 13
Unit 14
Text A Life in the Universe 14
Unit 15
Text B Black Holes 24
Text A Young and in Love 29
Text B A Kindness Returned 39
Text A The Other Woman in My Life 42
Text B Mama and the Roomer 52
Text A Charles Darwin 57
Text B The Long Chain of Evolution 66
Text A Should the Navy Draft Dolphins? 70
Text B A Lesson from Nature 79
Text A Health Food 82
Text B Dried Food 90
Revision Ⅰ 95
Text A A Good Heart to Lean on 98
Text B Becoming a Better Person 108
Text A A Television Production 113
Text B How Do the Movie Do it 123
Text A A Letter from an Editor 128
Text B After a Visit to Canada 137
Text A Albert Einstein 141
Text B Madame Curie and Radium 151
Text A Never Say Good-bye 156
Text B The Man on the Train 165
Text A Computers 172
Text B The Most Powerful Computer in the Universe 180
Text A Aggression in Humans and Animals 185
Text B A Wing and a Prayer 197
Text A Test-tube Babies 201
Text B Biological Clocks 210
RevisionⅡ 214
Glossary 223