How much human capacity?

Is there a limit to how much you can learn and know? As in, is there a sufficient capacity to the human brain, and how quickly we can remember and think of retrospective things?

• Answer:

  I remember learning that with a lifespan of 80 years, we'd have to learn 5 new things per second, 24/7, from birth to death, and not forget anything in order to fill it. That may not be totally accurate, but that's a lot of "wiggle room."