Is it possible for something to be smaller than a Planck length?

[multiversetheory]

After watching a youtube video 2 years ago, the video said the smallest thing known is at Planck length, but could there be something smaller than Planck length

 

[CookieSalesman]

Not the best response someone can give, but so the reason the plank length exists as a term is because this is the distance that which light travels in the plank time. Below this distance, quantum uncertainty takes over and essentially means that all your measurements are meaningless. Measurements are measurements because they do not change, for one. The uncertainty principle states that position and momentum uncertainty has a minimum value. You can never exceed a certain amount of accuracy during measurement. Yadda yadda yadda, I think that this ends up indicating that at such short distances and times if anything is going on down there, you have no idea what it is.

 

[phinds]

After watching a youtube video 2 years ago, the video said the smallest thing known is at Planck length, but could there be something smaller than Planck length

Yes, just as there can be something smaller than a meter or smaller than a foot. It's just a man-made unit of measure. Nature really doesn't care.

 

[Nugatory]

This question comes up often enough that we have an Insights artic;e for it: https://www.physicsforums.com/insights/hand-wavy-discussion-planck-length/

 

[Klystron]

This question comes up often enough that we have an Insights article for it: https://www.physicsforums.com/insights/hand-wavy-discussion-planck-length/

From the above Insights article:
"There is a push towards making our human units based on physical constants, like defining the meter in terms of the speed of light, but at this time the kilogram is still the mass of a brick in France." [2015]

I understand the physical constants have since been updated. Perhaps this article could be updated and/or linked with the current definitions. I also believe the self-deprecatory 'hand wavy' description in the title and text to be unnecessary as the reasoning seems sound. Thanks.