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9 comments

[–] doggone 2 points (+2|-0)

I'd go with something like the Forbidden Zone signage.

http://cdn.collider.com/wp-content/uploads/planet-of-the-apes-forbidden-zone.jpg

No matter what they come up with, someone will always want to look inside.

It's an interesting thought experiment to follow down the rabbit hole.

Those symbols look foreboding. But human curiosity is a major obstacle to overcome.

[–] doggone 2 points (+2|-0)

Or not human. They are looking for a universal language for any being who doesn't have cultural reference. Something like the golden record, I guess, which I would never figure out.