Unit 1 Text A：Genetically Modified Foods——Feed the World？ Text B：Genetically Modified Foods：Are 7hey Safe？ Unit 2 Text A：The Biology of Skin Color：Black and white Text B：Immortal Avatars：Back up Your Brain，Never Die Unit 3 Text A：Can Dirt Do a Little Good？ Text B：Urban Air Pollutants Can Damage iQs before Baby’S First Breath Unit 4 Text A：IsTime 7ravel Possible？ Text B：Building a 7ime Machine Unit 5 Text A：The End of E—mail Age Text B：E—mail Gets an Instant Makeover Unit 6 Text A：Are Cell Phones Safe？ Text B：want tO Know Your Disease Risk？Check Your Exposome Unit 7 Text A：Seeing the Earth for Its Faults Text B：Can Geothermal Energy Pick up Real Steam？ Unit 8 Text A：why We Are Fat？ Text B：More Protein，Less Refined Starch Important for Dieting Unit 9 Text B ： Is Stephen Hawking Right about Aliens? Unit 10 Text A：Video Gamers Can Control Dreams,Study Suggests Text B：Dream States：A Peek into Consciousness Unit 11 Text A：For Mobile Touch Technology,lt's Only the Beginning Text B：It 's a Smart World Unit 12 Text A：Fact or Fiction：The Days （and Nights） Are Getting Longer Text B：The Primal and Future Moon References
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