As time continued to pass, these long-lasting facilities became very important to the remaining civilizations.
Many of them were built to last for extremely long periods. Their structures were made from materials that could survive radiation, temperature changes, and slow damage from space.
Inside these facilities were large archives.
These archives stored scientific records, historical information, engineering designs, and cultural knowledge from many different civilizations.
Some archives had been maintained continuously for millions or even billions of years.
Automatic systems regularly checked the stored information.
If a storage device began to fail, the system copied the data to a new device. This prevented knowledge from being lost over long periods of time.
Multiple copies of important information were stored in different locations across space.
This way, if one archive was destroyed or stopped working, the knowledge could still survive elsewhere.
