蜃気楼（しんきろう）はなぜ見えるの？
Mirages happen because light bends when it passes through air layers of different temperatures. For example, in a hot desert or on a heated road, the air near the ground is much hotter and lighter than the air above it. Light bends along this difference, making it look like there are pools of water or reflections. A mirage is actually a kind of optical illusion!
