Ignoring the change in foreheads Ent/TOS/TNG for the time being at least.
In Enterprise the Klingons are an advanced race- probably more so than the Vulcans, who appear to be actively wary (scared) of them.
By TOS humans have more than caught up, then by all accounts they manage to keep level-ish from there on.
What were the Klingons doing for the intervening 100 years?
In Enterprise the Klingons are an advanced race- probably more so than the Vulcans, who appear to be actively wary (scared) of them.
By TOS humans have more than caught up, then by all accounts they manage to keep level-ish from there on.
What were the Klingons doing for the intervening 100 years?