A team of Japanese high-school students recently won a regional innovation competition with a high-tech device that divides cake and pizza into equal portions every single time.

It’s a problem as old as the world – cutting a round treat into more than two equal parts. You either end up with portions that are not exactly the same size, or you’re left with a smaller extra slice that everyone has their eye on. Well, thanks to the ingenuity of a group of Japanese students from Kundong High School in Japan’s Oita Prefecture, dividing a cake or a pizza into perfectly equal portions need no longer be an issue. They have created a high-tech device that calculates the angle at which the tasty treat needs to be cut, depending on the number of necessary slices.

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65-year-old Orestes Estevez, a winemaker from Havana, Cuba, has come up with a very ingenious use for latex condoms. He places them over large jars of grape and fruit juice and they let him know exactly when the fermentation process is completed.

Condoms are very popular in Cuba, but not just as a contraception method. Years of international embargo and low income have forced many Cubans to make due with whatever products they had access to. Last year, we wrote about Havana’s “balloon fishermen” who use inflated condoms as cheap lures that carry their lines far into the ocean to catch expensive fish like red snapper, barracuda and tarpon without having to leave the shore. Today, we learn about a wine maker who uses them to perfect the fermentation process of his wine.

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