Determining whether an egg is fresh or spoiled doesn’t require complex equipment—just a simple glass of water. As eggs age, their internal air cells expand, causing them to behave differently when submerged. Looking at the three test cases in the image, can you spot which egg is no longer safe to eat?
At first glance, all three eggs look almost identical.
But there is one important clue hiding in the way they behave in the water.
Look closely at eggs 1, 2, and 3.
Which one would you avoid eating?
