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We breathe in. We breathe out. A dramatic, amazing, perfectly engineered process takes place inside our bodies twelve times each minute, and we hardly even notice.
Before you read any further, do this little experiment. Grab a drinking straw and then get your heart really pumping—run up and down several flights of stairs or sprint across the yard a couple of times. Make yourself good and winded. Now, put the straw in your mouth and breathe through it. Just the straw. Pinch your nose so you don’t cheat. And wait for the panic to set in.
Do we have your attention now? Good. Take the straw out, breathe normally, and read on.
ISSN-1059-6518
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