The sound of summer is ice cracking as you pour yourself a cold drink. Hearing that snap and pop cools everybody down. But why does ice crack? Periodic Videos explains the reason why ice straight from freezer suffers that sudden crack versus how ice left on a tray will just melt instead of crack.
via Gizmodo http://ift.tt/VaFU83 http://ift.tt/1mI7hvR
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