• When you’re in #microgravity, all those systems still work to push fluids to the upper body, unopposed by gravity, so you get this #swelling of tissues in the head 🤯
• In some crew members, in addition to mild visual changes, there have been findings such as optic nerve swelling, retinal changes, changes in the shape of the eye 👁️ and a suggestion that there might be an increase in intracranial pressure
• Up to a third of muscle 💪 from particular muscle groups being lost 〽️ within seven to 10 days of flight. This also includes deterioration of heart ❤️ muscle
• Lack of gravity also has the effect of causing bone 🦴 to, almost literally, dissolve away
• With a new dawn 🌅 every 90 minutes, #astronauts struggle to adapt to artificial night times 😴
• There is growing evidence that #spaceflight has a detrimental effect on the immune system ⚕️.
• Astronauts often report “seeing” bright flashes ⚡ of light, which are caused by cosmic rays passing through their brains 🧠 https://www.bbc.com/future/article/20140506-space-trips-bad-for-your-health