This publicity photo shows the difference between visible and infrared views of the road ahead. This disc hides the infrared detector. Dear deer Out here in Wisconsin, deer are a drag for drivers. The 1.5 million deer in the state cause an estimated 40,000 to 50,000 collisions each year.
Some people favor reducing collisions caused by record deer numbers with more hunting .
The Why Files wanted to know how well it works. We asked for a test drive, but Cadillac insisted we pilot a brand-new Deville for a week's cruise. We imagined visiting Las Vegas to yank the crank on a slot machine, but had to settle for visits to Chicago and an old-time Wisconsin ice cream parlor. Infrared is emitted by molecular vibrations in anything that's warmer than absolute zero, which means everything since nothing exists at absolute zero. Although our eyes can't detect infrared, our skin feels it as heat.