From Edward Catmur
Red, green and blue are the colours of the Martian flag
(15 January, p 5) not
as a reflection on human optical biology but as a declaration of intent. Red
(Martian rock), green (plant life) and blue (liquid water) are the successive
stages of terraforming Mars, as set out in Kim Stanley Robinson’s epic trilogy
Red Mars, Green Mars, Blue Mars.
ed_catmur@hotmail.com
