Evolution of Sleep

The detrimental effects of blue light on melatonin production are rooted in our evolutionary history, originating from life in the ocean where blue wavelengths predominated. Sleep, a fundamental biological function, has existed since the dawn of life, evolving through various species, with REM sleep appearing later in the lineage of birds and mammals. This highlights the crucial role sleep plays in our existence, suggesting it is anything but a mistake in the evolutionary process.