Unit 1 Space Exploration 1
Main Reading:One Small Step back to Where We Started 6
Related Reading:Setting Sail into Space,Propelled by Sunshine 13
Unit 2 Energy 31
Main Reading:Renewable Energy Sources-A Brief Summary 35
Related Reading:Man Power:A Great Alternative 41
Unit 3 Gender Differences 57
Main Reading:Understanding the Differences Between Men and Women 61
Related Reading:Why Women Live Longer Than Men 66
Unit 4 Information Security 83
Main Reading:The Word"Hacker" 87
Related Reading:New Rules for Big Data 93
Unit 5 Future Vehicles 110
Main Reading:On the Road with the Airpod Air-powered Car 114
Related Reading:How Maglev Trains Work 120
Unit 6 Skyscrapers 136
Main Reading:The Sky's the Limit 140
Related Readinq:Scrapinq the Skv,and Then Some 145
Unit 7 AnimaI Behavior 161
Main Reading:Collective Decision 165
Related Readinq:Do Animals Have Lanquaqe? 171
Unit 8 NaturaI Disasters 187
Main Reading:Tsunami:Wave of Change 191
Related Reading:Earthquake Prediction:Mission Impossible 197