Im kinda shocked we dont have rotating chambers so they can simulate gravity.

But ive seen plenty of videos where its obvious they are using wires, so I dont know. Maybe its cheaper to just fake the videos, then have people actually living up there.

One of things I always wondered about is air line crew, like pilots and stewardess/stewards.

They had to fight hard to get insurance to cover the higher rates of cancer in the industry.

According to the cdc this is simply not true.

Do aircrew have higher rates of cancer than the general population? Aircrew do not appear to be at higher risk for cancer than the general population. In the United States, 1 in 2 men and 1 in 3 women will develop some form of cancer in their lifetime. Many exposures can contribute to cancer risk, some of which could be related to a person’s occupation. Airline pilots and flight attendants are exposed occupationally to certain known cancer risk factors (e.g., cosmic radiation, ultraviolet radiation, and circadian rhythm disruption).

Several studies of aircrew have shown that overall and cause-specific cancer mortality is low compared with the general population despite these additional occupational exposures. As compared to people who do not fly for a living, pilots and flight attendants might be more likely to develop skin and female breast cancers, but reasons for this are unclear. CDC provides more information on cancer in aircrew, including steps that might reduce skin and breast cancer risk.

https://www.alpa.org/news-and-events/air-line-pilot-magazine/skin-cancer-remains-serious-concern

It’s widely known that pilots and flight attendants are exposed to elevated levels of ultraviolet (UV) and cosmic-ionizing radiation and that prolonged exposure increases the risk of developing different kinds of skin cancers. The National Institute for Occupational Safety and Health this past January reported, “We know the level of UV radiation is higher at commercial aircraft altitudes than it is at sea level, but we don’t know exactly how much UV radiation is blocked by the windshield and cabin windows on all commercial aircraft.”

To further complicate matters, the very nature of airline operations can be another contributing factor. The Centers for Disease Control and Prevention (CDC) has stated, “Some studies suggest that circadian rhythm disruption may also cause [skin] cancer.” The CDC acknowledged that this disruption includes irregular work schedules, jet lag, and crossing multiple time zones.

:Shrugs:

https://www.forbes.com/sites/victoriaforster/2019/07/04/do-astronauts-have-an-increased-risk-of-cancer/

A big concern for the health of astronauts is exposure to radiation. On Earth, we are protected from most space radiation by the planet's atmosphere, but on the space station and further afield, this is not the case and astronauts are exposed to far more. Radiation damages DNA and damaged DNA can lead to cancer, raising fears that astronauts and cosmonauts have an increased risk of cancer from their time spent in space. NASA lists "Risk of radiation carcinogenesis from space radiation" as one of its top research priorities.

The more time someone spends in space, the more radiation they will be exposed to and the more DNA damage they will, in theory, accumulate. As to whether this DNA damage actually increases an individual's risk of cancer or not is certainly more nuanced and is influenced by numerous other environmental and genetic factors. For example, it would likely be fair to say that modern serving astronauts are likely to be among some of the fittest people on the planet, likely to have healthy diets, exercise a lot and not smoke, nor drink to excess. All of these will reduce their chances of getting cancer.

As a cancer research scientist who works on DNA damage and how it causes cancer, I am not surprised that this study concluded no substantial effect on cancer risk. However, in a decade or two time the picture may be very different. Larger numbers of astronauts who have spent great spans of time in space will be reaching old age where even normal people are quite likely to get cancer. It may be that historically shorter spells in space have little-to-no effect, but those with longer stints start to show an increased risk of cancer.

It could be as simple as trying to protect these people without undermining the publics trust in the program. But i certainly as fuck dont know.

I do know that video is very low resolution which would make it easy to doctor, and that it does appear to be a water cup with water in it. And not some weird experiment involving density of liquids in a sealed container or something.

I assume something like oil and water would separate out on its own after time. Not from gravity, but mainly waters ability to attract itself.

Separating fluids without gravity is complicated Oil and water, for example, separate because they have different densities—the denser fluid (water) is heavier and sinks while the less-dense fluid (oil) floats. Without gravity, the oil and water mix freely and must be separated by alternative means.

https://www.youtube.com/watch?v=9jgBKdhCp5Y

So im wrong actually, but I guess spinning it in a centrifuge would sort it all out again. Im surprised water doesnt have a strong enough cohesion to sort itself out on its own.

Meh.