Uploaded February 2018 | Updated September 2026, 2 hours ago
There is a term we've heard that has been thrown for years now... but what is it? What is Dark Matter? Is it real? Is it dangerous??
There is a term we've heard that has been thrown for years now... but what is it? What is Dark Matter? Is it real? Is it dangerous??









![The Worst Day of My [NASA] Life
This is the worst day of my professional life as of yet. Lets see if I can top it. I dont think it needs to be said that I now check my LinkedIn daily.
If youd like to support me in this adventure of creating a home-made Masters level course for everyone, please consider donating $1/month at https://www.patreon.com/spacebutmessier The Worst Day of My [NASA] Life](https://i.ytimg.com/vi/pU0eh9hM76I/mqdefault.jpg)
