From Keith Ross
Newswire reports that the Mars Society has adopted red, green and blue for
the Martian flag
(15 January, p 5).
These are only primary colours for humans on
Earth because of the sensitivity of the three colour sensors in our eyes.
Nonhuman intelligent life forms are not likely to have the same sensors. We
need to avoid anthropomorphic symbols for such universal communication.
The special significance we put on numbers that are perfect powers of 10 is
equally parochial.
Cheltenham
