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Posts tagged winter

September 27, 2003

 

Why Do Cats Shed in Winter?

Changes in sunlight cause the cat’s brain to signal its hair follicles to respond appropriately. When there’s less sunlight, cats start growing short, fluffy secondary hairs whose job is to provide insulation. And when there’s more sunlight, cats start shedding.

September 27, 2003

 

Mosquitoes in Winter

First, it reduces ice formation within the mosquito’s cells, so that water hardens like glass but doesn’t form ice crystals that can then damage the cells.

September 27, 2003

 

Living in an Ice Age

During the current ice age glaciers have advanced and retreated over twenty times. We’re living during one of the warmer periods when the glaciers have retreated.

September 27, 2003

 

Sunrise, Sunset

Now, at sunset, the lowest mile or so of the atmosphere is filled with things like vehicle exhaust, dust, smoke, and water vapor, and all these pollutants scatter light.

September 27, 2003

 

Fluff up the Down

The large ones we see when a bird stretches its wings are “flight feathers,” but they also have fluffy ones called “down feathers.”

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