Was the Stone Age the Stone Age for all civilisations ? What if....it just was not ?

If ETs came on earth today and were presented a bunch of Amazonian tribes..would they declare Earth in the Stone Age ?

This page is a permanent link to the reply below and its nested replies. See all post replies »

If ETs came to earth today, I think it's likely they'd declare all of us in the Stone-Age-hidden-by-fancy-gadgets.