UNIT 1 Information Overload 1
UNIT 2 The Achilles Heel 20
UNIT 3 Early to Bed,Early to Rise 39
UNIT 4 Animal Intelligence 59
UNIT 5 Longevity：Refusing to Be Invisible 77
UNIT 6 Giving to Others：Why Do We Do It? 94
UNIT 7 Goodbye to the Sit-Down Meal 115
UNIT 8 No Technology?No Way! 133
Unit Word List 153
The Phonetic Alphabet 155
Credits 156