When the leaves fall from the trees, this can only indicate that winter is around the corner. The air is clear, and the mountains are covered in white powder. A warm winter cap is essential for anyone who ventures outside. Most people also wear a scarf. No matter where someone lives, they know that cold weather is coming. The atmosphere gives off that frosty feeling. Winter is the hottest season of the year. The temperatures in this season are prolonged, and cold will often drop below zero. Many animals will hibernate in response to this, reducing their metabolic activity. Such...