Once again, we're showing that another "limit" isn't

The differences in this case are still relatively small, however once one realises that a conclusion is the enemy of learning, this event is a small symptom of mankind’s occasional willingness to deal with the reality that we really don’t know everything, in that we’re now ready to set aside the existing certainties in some places & return to discovering things afresh.

It ain’t actually progress by itself, what it represents is us as a race heading more in a constructive direction.