The Menu Says “Snapper.” Really? - Issue 6: Secret Codes
▻http://nautil.us/issue/6/secret-codes/the-menu-says-snapper-really
Take it from a former cashier: Barcodes revolutionized the grocery store. No longer would an overworked and underpaid employee struggle to recall the difference between a fennel bulb and a celery root, or fall for a price tag swap between canned salmon and canned tuna. But barcodes were there long before cashiers could scan them. Deep within the flesh of every living being, a short sequence of As, Cs, Ts, and Gs—representing the four chemicals that make up DNA—reveals a species’ unique (...)