Why did mybananas turn brown in the refridge yet still green?

Bananas turn brown due to a process called enzymatic browning, which is triggered by the breakdown of chlorophyll and the production of melanin. When stored in the fridge, the cold temperature slows down the ripening process, but it can also cause the peel to darken while the fruit inside remains green and firm. This is because the chilling temperature can damage the banana's cells, leading to browning of the peel without affecting the ripeness of the fruit itself.