The completion of the FTL megastructure brought an initial recovery of productivity to this daring Collector cluster. The Collectors no longer had to share a single large gravity ring, and the number of individuals in the cluster was also increasing.
After arriving in a new star system, the megastructure organisms each moved to their assigned resource sites to mine and process resources, while the other Collectors prepared material resources and constructed and designed other types of biological megastructures.
After the storage megastructure, the Collectors chose a cooling megastructure as their next FTL megastructure, because the cluster's waste heat problem urgently needed to be resolved.
The FTL cooling megastructure had a different structure from the original cooling megastructure. Although their principles were the same, both relying on thermal radiation for cooling, the Collectors decided to incorporate the physical property of "accelerated time flow" into the design.
Gravity compressed spacetime, slowing the passage of time. Conversely, spacetime expansion caused by repulsion increased the rate at which time passed within a region.
Matter within an expanding spacetime region experienced more time than matter in normal spacetime. Even if the efficiency of thermal radiation remained unchanged, the accelerated passage of time effectively increased cooling efficiency, because the cooled matter experienced more time than matter in normal spacetime.
The front retained the structure of a gravity ring, where negative matter was produced. A sturdy, resilient keel then extended toward the rear, connecting to a ring that stored negative matter.
The FTL cooling megastructure possessed the longest and most complex negative-matter pipelines of all biological megastructures. The outer layers of these pipelines were covered with a thin layer of gaps, only one molecule thick.
These were the cooling surfaces of the cooling megastructure. After helium molecules entered these gaps, the spacetime expansion caused by the negative