utensil birds

What we "know" conceptually has far outstripped what we
experience empirically. We are finally beginning to accept the fact
that our senses allow us to perceive only one-millionth of what we
know to be reality—the electromagnetic spectrum. Ninety-nine
percent of all vital forces affecting our life is invisible. Most of the
fundamental rates of change can't be apprehended sensorially.
Fuller: "Better than ninety-nine percent of modern technology occurs
in the realm of physical phenomena that are sub or ultra to the range
of human visibility. We can see the telephone wires but not the
conversations taking place. We can see the varieties of metal parts
of airplanes but there is nothing to tell us how relatively strong these
metals are in comparison to other metals. None of these varieties
can be told from the others by the human senses, not even by
metallurgists when unaided by instruments. The differences are
invisible. Yet world society has throughout its millions of years on
earth made its judgments on visible, tangible, sensorially
demonstrable criteria."3