Glassy roads: Black ice in Germany: With these tricks you can avoid bad slips

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Black ice: Freezing moisture causes slippery streets and sidewalks. Orthopedists and trauma surgeons are already warning about falls. But clever tricks from the animal world protect you from falling.

Black ice: Freezing moisture causes slippery streets and sidewalks. Orthopedists and trauma surgeons are already warning about falls. But clever tricks from the animal world protect you from falling.