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Unit One Can the Giant Panda Be Saved? 2

Timed Reading:Chiense Giant Pandas Abroad 8

Unit Two Reunited Twins Act Amazingly Alike 13

Timed Reading :Identical Twins 22

Unir Three Mysteries of Migration 27

Timed Reading :The Migration 36

Unit Four Biological Clok(1) 44

Unit Five flight Recorder-Airborne Recor d Keeper 58

Timed Reading :The Bermuda Triangle-A Mystery of the Ocean 67

Unit Six Our Future in Space :It Has Already Begun1 72

Timed Rcading:Space Sick 82

Unti Seven Space-Age Archeology 88

Timed Reading:A tonic Clock maker Knew His Dates 97

Unit Eight Fresh Water from the Sea 102

Timed Reading:Why Is the Ocean Salty? 110

Unit Nine Compurters in Cars 113

Timed Reading:Mottorists'Electronic Guide Saves Time and Money 121

Unit Ten Computers Balle Bugs 128

Timed Reading:"The Kid Put us Out of Action" 136

Unit Elveen Teacher in the Sky 144

Timed Reading:Earth Resources Technology Satellite(ERTS) 153

Unit Twelve Queen Introduction and Queen Accptance 157

Timed Reading:Bees Bring a Breath of Fresh Air into Hives 164

Unit Thirteen Giraffes 170

Timed Reading:Beavers 179

Unit Tourteen Can Scientists Predict Killer Earthquakes? 184

Timed Reading:How Do Animals Know When an Earthquake Is Coming? 193

Unit Filteen Elephant Man:A Life in the Shadows 197

Timed Reading:An Elephant Man 205

Unit Sixteen Robots 210

Timed Reading:Robot Sentries 219

Unit Severteen Ttying to Fool the Infertile 224

Timed Reading:Test-tube Babies 233

Unit Eighteen Science Education for a New AGE 238

Timed Reading:Learnig Science 249

Unit Ninetteen Gorilla IsNot as Mean as it Looks 254

Timed Reading:Can Apes Really Learn To "Talk" 265

Unit Twenty CAUTION :Animals on the Move 270

Timed Reading:The Shark:Splendid Savage of the Sea 281

Unit Twenty-One Frederick Sanger -Two -Time- Winner 285

Timed Reading:Samuel F.B.Morse 293

Unit Twenty-Two Suntire:Solar Collector Built By Kids 300

Timed Reading:Patrick Platt Makes Heater From Old Cans 309

Unit Twenty-Three Black Holes 314

Timed Reading:The"Beast"inthe Center of Galaxy 323

Unit Twenty-FourSpace Shuttle Is Ready for BIG BLAST 328

Timed Reading:Contest Winner Visits Launch Site 337

Unit Twenty-FiveSylvia Earle-Diving Scienlist 345

Timed Reading:Deep- sea diving Diving Lurk 355

Unit Twenty-Six Pompell 361

Timed Reading:A Volcano Wakes 370

Unit Twenty -Seven The Time Is Now 378

Timed Reading:The Invisible World of Industrial Gas 386

Unit Twenty-Eight A CID RAIN:What's the Solution? 391

Timed Reading:Is Acid Rain Washing Away Our Heritage? 403

Unit Twenty=NineSociet March to Mars Startles the Weart 411

Timed Reading:The Space Race 421

Unit Thirty AIDS:The Nation's Worst Pu lic -HealtbProblem 427

Timed Reading:A New Technioque in Fighting AIDS 437

Answee Keys 441