How It Works Issue 140
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Published 7th July
Step into a hospital's intensive care unit in issue 141 of How It Works, to discover how skilled medical professionals and hi-tech machinery work together to save patients from critical injury and deadly diseases.
Also this issue: how global lockdown has helped the environment bounce back, meet the antibiotic-resistant superbugs, see the tallest superstructures in the world, the secret codes of Germany's Enigma machine, a guide to the planet Mercury, plus 3 free How It Works special digital editions worth £30 for every reader.