A reasonable question of physics is if there is a smallest possible size and shortest duration and some scientists have claimed that there is and they are called the Planck length and Planck time. In this episode of Subatomic Stories, Fermilab’s Dr. Don Lincoln explains the truth of the Planck constants. It’s not what you think.

Don Lincoln article in Fermilab Today: “Planck length, minimal length”
https://www.fnal.gov/pub/today/archiv...
 
Alden Mead’s 1964 paper: “Possible Connection Between Gravitation and Fundamental Length” (subscription required)
https://journals.aps.org/pr/pdf/10.11...
 
Frank Wilczek’s paper on absolute units
http://ctpweb.lns.mit.edu/physics_tod...
 
Mead and Wilczek’s public conversation
http://ctpweb.lns.mit.edu/physics_tod...

Energy conservation in general relativity: John Baez
http://math.ucr.edu/home/baez/physics...

Energy conservation in general relativity: Sean Carroll
https://www.preposterousuniverse.com/...

Fermilab physics 101:
https://www.fnal.gov/pub/science/part...

Fermilab home page:
https://fnal.gov