We are awash in signals. At any given moment, a hit pop song or two, several dozen cellphone calls, a few tracking and control signals, and a plethora of other invisible wave-born impulses are sweeping through each of us.
I thought about this as I soaked
in my hot tub while watching three satellites crossing directly above me in the
cobalt firmament of a predawn morning.
One of the satellites—the brightest of specs—eventually sliced diagonally
through the cup of the big dipper. The
other two drifted off against the host of nameless stars that have accompanied
me for the entirety of my life.
The satellites are also
emitting signals that may be brushing right through all of us.
As I thought about the invisible
waves unravelling impalpable peaks and valleys within us, I shuddered a little.
Can they all be harmless?
Consider how the invisible
waves echoed within the interior of a microwave oven are absorbed by food,
forcing water molecules to vibrate and produce heat that cooks the food.
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