Imagination involves creating a mental image of something that is not present for your senses.
The simplest form of imagining new objects and scenes happens in dreams. These vivid, bizarre involuntary fantasies are associated in people with the rapid eye movement (REM) stage of sleep.
Elias Howe, the inventor of the first sewing machine, claimed that the main innovation, placing the thread hole near the tip of the needle, came in a dream.
Genetic analyses suggest that a few creative  individuals spread their genes by eliminating other males with the use of an imagination-focused strategy and newly developed weapons.
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