# What else don't we know - mysterious objects

**URL:** <https://boards.straightdope.com/t/what-else-dont-we-know-mysterious-objects/996570>\
**Category:** In My Humble Opinion\
**Created:** [January 24, 2024, 12:02am UTC](https://boards.straightdope.com/t/what-else-dont-we-know-mysterious-objects/996570 "2024-01-24T00:02:12Z")\
**Posts on this page:** 2\
**Page:** 7

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**Author:** ![mixdenny](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/mixdenny/32/2962_2.png) [@mixdenny](https://boards.straightdope.com/u/mixdenny)\
**Post date:** [February 10, 2024, 8:38pm UTC](https://boards.straightdope.com/t/what-else-dont-we-know-mysterious-objects/996570/121 "2024-02-10T20:38:20Z")

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> [@Lucas\_Jackson](#):
>
> Non-conductive substrates such as plastic, bone wood, or glass cannot be electroplated unless first made conductive. This is done by coating the non-conductive substrate in a layer of conductive paint or spray - which we also have no evidence that they had.

They would be covered in gold leaf. An ancient skill.

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**Author:** ![Lucas\_Jackson](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/lucas_jackson/32/303_2.png) [@Lucas\_Jackson](https://boards.straightdope.com/u/Lucas_Jackson)\
**Post date:** [February 11, 2024, 6:41am UTC](https://boards.straightdope.com/t/what-else-dont-we-know-mysterious-objects/996570/122 "2024-02-11T06:41:39Z")

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> [@mixdenny](#):
>
> They would be covered in gold leaf. An ancient skill.

How is that relevant? Gold leafing doesn’t require batteries.

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