Culling the herd. Darwin had a busy day. This one died of carbon monoxide, by sitting in her car with the engine running and all the windows up, while the snow built up around the bottom of the car and sealed it. CO is an odorless, colorless gas that displaces oxygen in the red blood cells of the body, making it impossible for blood cells to carry oxygen from the lungs to the rest of the body. As a result, you die of oxygen starvation. Tell-tail sign, heightened redness in the face that looks like poorly applied rouge. Confusion leads to unconsciousness, and death. Treatment: blood transfusion. Once the carbon monoxide get hold of your red blood cells, they can't be fixed and must be replaced. If you are stuck in the car in a snowstorm, only run the car periodically to maintain a minimum amount of heat, and keep a window of the car cranked down an inch or so to allow fresh air to enter. If you can, clear around the bottom of the car to prevent the snow from sealing it. Never go out in winter for a long drive, or when a storm is coming, without more than adequate winter clothing. Gloves or mittens are vital. It's smart to keep a blanket in the trunk, and a shovel, and a bag of sand, and a portable light.