The idea of dating the pyramids using the C14 radiocarbon test goes always the way back to the invention of this science. Two broad studies of Old Kingdom pyramids using carbon testing have taken place, but they are incomplete.

There is enormous opportunity to date the pyramids more precisely by combining C14 testing and dendrochronology, the science of analyzing tree rings. But Egyptology doesn't show much interest in this science, and it only ever conducted carbon testing on pyramids due to outside pressure.

This video explores the knowns and unknowns of dating Egypt's pyramids, and the controversies and conflicts of interest for putting the physical science into the public messaging.

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Thanks as always to the Isida Project for use of their imagery: https://isida-project.ucoz.com/

Academic papers on carbon dating pyramids:

Felix Hoflmayer, 2016
https://academic.oup.com/edited-volume/43506/chapter/364132089

Michael Dee, 2013
https://www.academia.edu/31488085/An_absolute_chronology_for_early_Egypt_using_radiocarbon_dating_and_Bayesian_statistical_modelling

Georges Bonani, 2001
https://www.academia.edu/3428321/Radiocarbon_dates_of_Old_and_Middle_Kingdom_monuments_in_Egypt

Soundbite References:

Mark Lehner, Highland City Club, 2015
https://www.youtube.com/watch?v=6RLiyPybObs

Mark Lehner, Minot State University, 2019
https://www.youtube.com/watch?v=mzPo-dLOPwY

Zahi Hawass, 2016
https://www.youtube.com/watch?v=K7Toq_jOj_E

0:00 Intro
2:03 Invention of radiocarbon dating
3:31 Limitations of carbon dating
4:48 Edgar Cayce funds testing
6:34 David Koch funds testing
9:01 Alternative archaeology tourism
10:23 Carbon dating results
13:09 Dendrochronology testing
14:50 Dixon cedar rod in the Great Pyramid
16:16 Public opinion drives science