2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/10691The predictions of Standard Big Bang Nucleosynthesis are summarized and compared with observations of abundances of helium in HII regions, deuterium in quasar absorbers, deuterium and helium-3 in the Galaxy, and lithium in metal-poor stars. It is concluded that the prospects are good for a precise test of the theory.13 pages, Latex. Contribution to the Princeton meeting, ``Critical Dialogues in Cosmology''Astrophysicstext