Abstract
The authors introduce a new actor in the current drama of the Hubble tension (conflicting measurements of ${H}_{0}$), namely the age of the Universe ${t}_{\text{U}}$, as determined by the oldest globular clusters, and show that if local measurements are correct, the resolution of the Hubble tension implies a modification of the cosmological standard model $\mathrm{\ensuremath{\Lambda}}$CDM in the early and late Universe. Once systematic uncertainties are reduced, measuring ${t}_{\text{U}}$ will discriminate between the viable solutions for the ${H}_{0}$ tension, i.e. changing $\mathrm{\ensuremath{\Lambda}}$CDM or errors in the local measurements.
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