Reversing the sleep and wake cycles of the human through night shift work is known to cause extensive long term damage in humans.

Sleep disorders are commonly misdiagnosed as mental health disorders.

I associate night shift work with circadian rhythm disorders, extreme working hours and tumors.

Extreme night shift work was lone working for up to eighteen hours per night for several nights on the very high altitude summit of Mauna Kea.

Astronomers do not disclose to their nighttime support staff that they are at significant risk of developing shift work sleep disorder (SWSD) and the associated range of other sleep disorders.

Very high altitude extreme night shift work is a class 2A carcinogen that may result in lifelong disabling sleep disorders, high cholesterol, radiation sickness and heart, lung and brain damage.

Extreme night shift work in high altitude astronomy is easily avoidable by using a split night shift where the first night shift starts before sunset and finishes at midnight and the second night shift starts with a new fresh person working through to after sunrise.

I am just a sickened person that researches the toxicity of the many dubious things that I was exposed to.

Working the astronomy night shift required sitting and staring at many computer screens for up to eighteen hours per night for several nights.