For a few years during the mid-1990s, observations suggested that this might be the case, causing astrophysicists to talk about a Big Bang nucleosynthetic crisis, but further observations were consistent with the Big Bang theory.
I nogle få år omkring midten af 1990'erne antydede observationer, at dette kunne være tilfældet, og astrofysikere talte om en krise for Big Bang-nukleosyntese, men yderligere observationer har vist overenstemmelse med teorien.