2．A Wall Built along the Hillside 2
3．The Song of the Humpback Whale 3
1．A Biological Clock 4
4．Disputes about Animal Tests 4
5．What Made Them Geniuses? 5
6．How the Wasps Attack the Beetles 6
7．Chronic Fatigue Syndrome 7
8．Pollution in Antarctica 8
9．In Search of Planets outside Our Solar System 9
10．Was Robert Peary the First Person to Reach the North Pole? 10
11．Can Paper Last a Long Time？ 11
12．In the World of Ants 12
13．Phobos I and Phobos Ⅱ 13
14．Underground Drip Irrigation 14
15．A New Birth Control Vaccine 15
16．Research Balloons 16
17．Smokeless Cigarettes 17
18．The Airborne Arctic Stratospheric Experiment 18
19．A Computer Virus 19
20．The Monarch Butterfly 20
21．The Reuse of Irrigation Water 21
22．Beekeeping 22
23．Superconductive Materials 23
24．Biological Control for the Cassava Hornworm 24
25．Extremely Small Machines 25
26．The Fate of Smokeless Cigarettes 26
27．Sunspots 27
28．How Rhinoviruses Invade the Body 28
29．How to Make a Simple Microscope 29
30．Five Days in an Experimental Glass Building 30
31．Manic Depression 31
32．Fighting Air Pollution 32
33．Sensitive Corals 33
34．Pluto s Atmosphere 34
35．Bagasse Feed 35
36．Solar-powered Refrigerators 36
37．Conservation Reserve Program 37
38．Developing New Techniques to Find Problems in Older Planes 38
39．High-definition Television 39
40．Choose Your Crops 40
41．Another Season of Exploration in Antarctica 41
42．International Center for Tropical Agriculture 42
43．The Ant Man 43
44．New Findings about How Genes Work 44
45．Hubble Telescope and the Moon Telescope 45
46．Natural Farming 46
47．Hypothermia 47
48．A Comprehensive Utilization of Azolla 48
49．National Research Council 49
50．Even Young Children Can Learn a Great Deal 50
51．Rooftop Gardens 51
52．Hearing Loss 52
53．The Supply and Demand of Natural Materials 53
54．Urinary Incontinence 54
55．The Tanzania Oil Press 55
56．Cures for Environmental Problems 56
57．Rabbit Waste 57
58．New Kinds of Rice 58
59．Testing a New Way of Growing Bamboo Plants 59
60．The Dangers of Low Amounts of Radiation 60
61．Global Warming 61
62．Is Asbestos a Health Threat? 62
63．A Simple Earth-moving Device 63
64．New Rules Governing Food Products 64
65．How to Reduce Hunger 65
66．Biotechnology 66
67．Waterweeds 67
68．US7 68
69．Tuna Fish and Dolphins 69
70．Bicycle Centers 70
71．Ectopic Pregnancies 71
72．The Mysterious Flowing Sand 72
73．Research on Type One Diabetes 73
74．The Influence of Light on the Human Body Clock 74
75．Customs at New Year s Day 75
76．Treating Food with Low-level Radiation 76
77．The African Dust and Amazon Soil 77
78．The Map of the CD4 Protein 78
79．Geologists New Idea 79
80．A Man-made Kind of Photosynthesis 80
81．Useful Lessons Drawn from the Wheeled Tool Carrier 81
82．A New Way of Producing Electricity 82
83．American Peanut Production in 1991 83
84．Ethanol:A Clean and Cheap Fuel 84
85．How to Fool the Trees 85
86．Eager Beaver 86
87．How Researchers Get the Rare Things They Study 87
88．Is the Biosphere Project a Success? 88
89．A Robot Will Explore the Mysteries of a Volcano 89
90．The Explosion of Mount Pinatubo Affects the World s Weather 90
91．Cover Crops 91
92．The X30 Space Plane 92
93．The Main Reason People Get Fat 93
94．Using Animal Organs for Transplant Operations 94
95．Protect the Health of Pregnant Women 95
96．Rain Forest Exhibits 96
97．Genetically-changed Animals 97
98．The Buffalo 98
99．A New Plan to Vaccinate American Children 99
100．For the Benefit of Deaf Children 100
GLOSSARY 101