Two hemisphere metaphor
I trace on two sides if a thick piece of clear acrylic (discarded from optics experiments at University of Technology Sydney):
1. Human brain and nervous system (internal)
2. Human body form (external)
A key element in unravelling this question of what mechanisms underlie global climate change, “may well turn out to be the degree of synchronisation and the time lags between climate variations in the two hemispheres”.
Ref. A.B. Pittock. 1978. p.5. Climate Change and Variability: A Southern Perspective. Publication from conference, Monash University, Melbourne, Australia. 7-12 December 1975, sponsored by the Australian Academy of Science.