Future Humans: Just how far can our evolution go?

UNCERTAIN times bring thoughts of human futures. Amid the fever of change that was Victorian England, H. G. Wells wrote The Time Machine, in which humans had diverged into subterranean, orc-like Morlocks and the elfin, forest-living Eloi. The cold war 1960s saw the arrival of Marvel’s superpowered X-Men mutants, and, in 2009, the huge success of Avatar revealed that a surprisingly large number of people secretly wanted to be blue, 4 metres tall and have a telepathic ponytail.