There's a crisp chill in the air, summer shorts have made way for cozy sweaters, and a hearty stew sounds far more comforting than a light salad. You know what that means: It's peak apple season ...

The only catch? Apples are notoriously difficult to store once cut, as they quickly turn brown. Unfortunately, it's not possible to completely stop this browning—but it can be delayed.

Researchers have found that shining violet LED light on fresh-cut apples can stall the browning process. And their discovery not only boosts the visual appeal and shelf life of freshly-cut fruit ...