The ice caves of Alaska’s Mendenhall Glacier are dangerously beautiful! ❄️ They form when the glacier melts and moves, creating cool paths of bright blue ice. The stunning color is due to years of heavy snow pushing air out of the ice. Without air, ice only reflects blue light. But don’t let the beauty distract you—exploring ice caves is risky! They change as it gets colder or warmer and can collapse without warning. This danger is being seen more often as climate change causes the glacier to me