2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/5191I discuss why quintessential inflation model-building is more natural in the context of brane cosmology and study the dynamics of a particular model as an example.4 pages. Contribution to the Proceedings of the XVIIIth IAP Colloquium, added reference and corrected mistakesAstrophysicstext