There's more than one gene for it, and contrary to the article intro, they're pretty well studied at this point (though there's certainly more to do, as this il

There's more than one gene for it, and contrary to the article intro, they're pretty well studied at this point (though there's certainly more to do, as this illustrates). See for example: https://en.wikipedia.org/wiki/Circadian_clock#Mammalian_clocks https://en.wikipedia.org/wiki/Circadian_clock#Mammalian_cloc... There is a single gene that if disrupted will kill your circadian rhythm: Bmal1 aka Arntl. No other known gene has this property, but some combinations of other will do the same. https://en.wikipedia.org/wiki/ARNTL https://en.wikipedia.org/wiki/ARNTL