Monday 08 March 2021, 16:00- 17:00 If you have a question about this talk, please contact Sunny Vagnozzi. I will review how future measurements of primordial Non-Gaussianities in the CMB , Large Scale Structure and 21-cm cosmology can probe very heavy particle physics at inflationary energy scales. Intuitively, the production of heavy particles is due to the “Hawking temperature” of inflationary spacetime, and their measurement is via their decay into inflatons. Even greater mass reach is shown to be possible via “chemical potential” enhancement. These mechanisms are applied to plausible targets, namely our most ambitious gauge-Higgs and extra-dimensional theories, such as Orbifold Grand Unification, “dark” sectors, and the Standard Model itself, with particles as exotic as spin-2 Kaluza Klein gravitons. I show how the Hierarchy “Problem” of the Standard Model becomes an asset in this context, readily allowing its particles to have the requisite Hubble-scale masses during inflation, via the mechanism of “Heavy-Lifting”.