Science News for Students - Spring 2021

2 Editor’s note 4 Turning silk into medical implants 5 Table-tennis top becomes ‘smart’ 6 Trash gains value in a flash 8 This ‘living’ concrete slurps up CO 2 9 Micro-barbs make shots painless 10 This artificial skin feels ghosts 11 COVID-19 victims could breathe easier 12 Paper becomes a flexible keyboard 14 Print solar cells on anything 16 Making flip-flops biodegradable 18 Will bacterial ‘wires’ power your phone? 20 How ultrasound can kill cancer 24 New tech cloaks sounds 27 Trees power fire warning 28 Gene editing can ‘fix’ bad fat 30 HowCRISPR edits your genes 32 Quicker tests for antibodies 34 Unmasking hidden moods 35 Harvest water from thin air 36 Earth’s water forms one cycle 37 Crossword puzzle from the stories CONTENTS 14 30 24 8 CLOCKWISE: DENNIS SCHROEDER/NREL; KIRSTYPARGETER/ISTOCKPHOTO; CHRISTOPH BURGSTEDT/ISTOCK/GETTY IMAGES PLUS; COLLEGE OF ENGINEERING AND APPLIED SCIENCE AT UNIVERSITY OF COLORADO BOULDER ; EMPA

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