Heck, if another civilization is only 50 years advanced from us it would be like Einstein trying to converse with a four-year old
Just compare our knowledge base from 50 years ago with that of today. A LINEAR extrapolation of human knowledge (and it’s never ‘linear’) boggles the mind.
Great point! Our son had to do a report on scientific and other advancements in the last 50 years. At that time we didn’t even have CDs or DVDs yet!