1. https://science.howstuffworks.com/astronaut.htm
2. https://www.space.com/how-to-die-in-space-book-paul-sutter-interview.html
3. https://futurism.com/6-ways-the-interstellar-vacuum-will-actually-kill-you
4. https://www.universetoday.com/110755/whats-the-fastest-way-to-die-in-space/
5. https://www.theatlantic.com/culture/archive/2013/10/what-best-way-die-space/310306/
6. https://www.nasa.gov/hrp/5-hazards-of-human-spaceflight
7. https://www.readersdigest.co.uk/lifestyle/technology/10-health-hazards-in-outer-space
8.https://www.sciencemag.org/news/2016/12/shrinking-spines-space-fungus-top-five-dangers-space-travel