Part of human survival is developing an understanding that your job is damaging your health and changing career before permanent harm occurs.

We have yet to establish a permanent Mars colony for this reason: Trying to colonize Mars with humans is a known suicide mission that no one is talking about.

The military is not so much a job, it is more of a pathway to serious injury and permanent disability.

NASA astronauts have only managed to live continuously on the International Space Station (ISS) for a year and Biosphere 2 on Earth failed at two years of uninterrupted human habitation. Both cases required extracting the sickened people from the toxic environments. At this point it is ludicrous to talk about a permanent manned base on Mars.

The senior astronomy managers were aware of ‘Summit Brain’ and did not disclose to workers that it may lead to permanent damage to mental functioning.

It is not enough to say that high altitudes damage memory, one has to delve into the entire body to discover the underlying processes that eventually lead to permanent brain damage.

For some people, permanent biological damage may occur by venturing to 13,796 feet atop Mauna Kea, Hawaii.

Venturing above 10,000 feet in altitude may cause permanent biological damage in the sea level adapted human.