Falling into a black hole is a science fiction favorite. In this video, Fermilab’s Dr. Don Lincoln tells you what it’s really like, telling the facts and dispelling fiction. (Hint: avoid it if at all possible.)
What are black holes?
https://www.youtube.com/watch?v=eIHcIfWMX18
Test of relativity
https://www.nist.gov/news-events/news/2010/09/nist-pair-aluminum-atomic-clocks-reveal-einsteins-relativity-personal-scale
Fermilab physics 101:
https://www.fnal.gov/pub/science/particle-physics-101/index.html
Fermilab home page:
https://fnal.gov