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[–]wendolynne 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (3 children)

So, the attributes of an advanced civilization: plastic technology and a short attention span.
The word 'plastic' means changeable, by the way. Our plastic technology is approximately 100 years old. plastics deform easily - relatively low heat deforms them. grease reacts with tupperware. Hard plastics are brittle, shatter easily. If an ancient civilization had invented DVDs, and Medieval people found one, would they have any idea how to read it?

[–]wizzwizz4 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (2 children)

The word 'plastic' means changeable, by the way.

Ok. Hydrocarbon-based polymers.

If an ancient civilisation had invented DVDs, and Medieval people found one, would they have any idea how to read it?

No, but they'd probably cotton on pretty quickly that it was made of something they didn't recognise. Then they'd probably give it to children to play with as a Frisbee, or just discard it, or possibly keep it as a trinket for a few years.

Where are you going with this?

[–]wendolynne 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (1 child)

Perhaps something similar has been discovered, and we have no idea what it really is.

[–]wizzwizz4 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (0 children)

and we have no idea what it really is.

It's likely that someone nowadays would post it on the web, and people would share it if it was strange.