Mons, Barend

Barend Mons
Professor, Biosemantics
Human Genetics, Leiden University Medical Center
President of CODATA, International Science Council
2300 RC Leiden, The Netherlands

Second email: February 4, 2022 at 1:11 PM

RE: Naming groups of infinitesimal seconds, 10−27, 10−30, 10−33, 10−36, 10−39, and 10−42

Dear Prof. Dr. Barend Mons:

Congratulations on being so very creative and engaging the world just as profoundly as you can. You are surely an inspiration for us all, especially our students. Yet, we all have so much more to learn. It seems we may be on the cusp of a major scientific revolution that involves the infinitesimal scales right down to the Planck scale.

Back over a year ago I tried working through my colleagues here in the USA, but I have not received a confirmation or reply to that request. I am not sure if it was appropriate and that it might be considered.

I am not sure what is happening.

That letter, dated October 24, 2020, 6:27 PM, asks CODATA to consider naming six logical infinitesimal groups of sub-seconds, 10−27, 10−30, 10−33, 10−36, 10−39, and 10−42 seconds. The Yoctosecond (10−24), just one septillionth of a second, is the smallest duration of time that has a name. Planck Time is 5.391 16(13)×10-44 seconds. Laser physicists, Martin Schultze and  Ferenc Krausz, Max Planck Institute of Quantum Optics in Garching easily work with femtoseconds (10−15); they opened up the measurement of the attosecond (10−18) range, then in 2016 quickly moved into zeptoseconds (10−21). After the yoctosecond we have the nameless!

The nameless six groups could be readily named at your next meeting. Thank you.

Most sincerely,


PS. In 2011 our high school geometry class mapped the universe using the Planck Length and base-2 notation. We thought it was very cool. Few others did. At that time, I thought we were just too stupid to understand the basic foundations of physics. It wasn’t until 2016 when we extended our map horizontally with Planck Time, Planck Mass, and Planck Charge that we began to think, “This model of the universe needs to be explored by the scholars.”

Herding cats with an attitude might be a whole lot easier! We need those common names that cross international boundaries. I surely hope it is not too much to ask. Thanks again. -BEC

First email:  January 25, 2021

Dear Prof. Dr. Barend Mons:

As the president of CODATA, I hereby request that CODATA engage in the naming of 10−27, 10−30, 10−33, 10−36, 10−39 and  10−42. The 10−42 group includes 10−44 which is currently informally referred as the Plancksecond.  Reference:

In October 2020 I made such a request with Bonnie Carroll, the General Secretary of CODATA, but that note is unacknowledged.


Anything you can do to help will be profoundly appreciated.
Thank you.

Most sincerely,