Rooftops

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Credit

Description

A basic unit of currency.

Novel

The Mightiest Machine

Author

John W. Campbell

Built

Yes

Year Made

1000s BCE

Companies

Product

Currency

coming soon

// TECHNOLOGY–SECRETS–WORTH-SHARING PUBLISHED 18.04.21 FILE SIZE 497 KB FILE FORMAT MP4

NAVIGATION

“The best way to keep a secret is to shout it from the rooftops” – Edwin Land

Rooftops