Smart Tags Change Color as Food Spoils

Alessia Andreotti
March 19th 2014

Knowing whether food has spoiled without tasting it, is now possible. Smart Tags, developed by Chinese scientists, are small gel-based tabs that stick to containers of food and change color when something has expired.

Presented at a meeting of the American Chemical Society, the labels have been successfully tested on cartons milk.

Made of metallic nanorods, vitamin C, acetic and lactic acids and agar, Smart Tags change color and react to alterations in temperature that may affect food freshness.

Programmed to change color over the expiration cycle of a product, the tabs start red, then switch to different shades of orange, yellow and, when the food goes bad, they become green. It could have been a NANO Supermarket product!

Source: CBS News

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Should men be able to give birth to children?


Koert van Mensvoort: Is the artificial womb frankenstein-like symbol of (male) engineers trying to steal the magical womb from women? Or… is it a feminist project and needed to reach through equality between the sexes? I personally lean towards the latter. To me it feels like progress if a girl can tell a guy to carry the womb for a change.

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