The system notifies the user of the progress of a task by changing the appearance of the pointer. System-busy pointers usually adopt a timepiece metaphor.

This world, after all our science and sciences, is still a miracle; wonderful, inscrutable, magical and more, to whosoever will think of it.

the iconography of the ancients

However, in Cloeon evidence from experiments with gilled and gillless nymphs suggests that the primary, perhaps sole, function of gill movement is to reduce...