In Finland, people used to put live frogs in milk to keep it fresh

It’s hard to imagine a frog in your milk container. But not in Finland! This might sound like a bizarre folk tale, but this unusual practice was reportedly followed by rural communities in Finland and Russia long before refrigerators were introduced. Back in time, people would place a live frog in a vessel of milk and allow it to help delay spoilage. While the practice might seem unhygienic and extremely shocking, scientists have discovered a fascinating connection between this traditional belief and the natural defence mechanisms of amphibians.Curious case of frog and milkBefore refrigerators became a household thing, keeping milk fresh was a challenge for farming communities. Fresh milk could spoil quickly, particularly during warmer weather. So in rural communities, people relied on several traditional methods to extend the usability of perishable foods.One of the most unusual reported practices was placing a live frog in a vessel of milk.