insideHistory.in on Instagram: "When a block of dry ice (solid carbon dioxide) is dropped from a plane into warm, humid air—especially over a tropical lagoon—it undergoes a process called sublimation, where it turns directly from a solid into a gas. Because dry ice is extremely cold (around -78.5°C), it rapidly cools the surrounding air. This causes the invisible water vapor in the atmosphere to condense into tiny liquid droplets or ice crystals, forming a dense, visible artificial cloud or fog.