Scientists Invent Tags That Can Tell You When Food Goes Bad

By: Lawrence Bonk

That old saying "don't cry over spilt milk" may soon go the way of the dodo, if the ever-expanding wheels of science have anything to say about it. A team of Chinese researchers have invented something they are calling smart-tags. These tiny gel-like tabs can be affixed to just about any perishable food stuffs, from canned products to jugs of milk.

How does it work? Each tag is made from the futuristic sounding nanorods, that are actually made out of gold and silver (they are still cheap to produce.) Each microscopic rod also contains a series of compounds that change color depending on what stage of development your can of soup is in. Red means the food is super fresh and if it traverses the rainbow and ends up on purple, your stomach is in for a world of hurt.

These tabs are making their rounds in science journals, so they could be a long ways off from seeing store shelves. In the meantime, just don't drink milk that is green and thicker than cottage cheese.

Keep Reading

On TV

Brunch at Bobby's

9:30am | 8:30c

Brunch at Bobby's

10:30am | 9:30c

Good Eats

2pm | 1c

Good Eats

2:30pm | 1:30c

Carnival Eats

3:30pm | 2:30c

Carnival Eats

4:30pm | 3:30c

Carnival Eats

5:30pm | 4:30c
On Tonight
On Tonight

The Best Thing I Ever Ate

8pm | 7c

Good Eats

11pm | 10c

Good Eats

11:30pm | 10:30c

Good Eats

3am | 2c

Good Eats

3:30am | 2:30c
What's Hot
What's Hot

The Best Thing I Ever Ate

New Episodes Sundays 8|7c

Pick a Side!

The Snackdown

In our new animated series, we debate the most-pressing food matters of our time, like is cereal a soup?

So Much Pretty Food Here