Revelation Space (Revelation Space, #1)

by Alastair Reynolds

Apart from simulating planetary weather, the clouds served to break up the upsetting perspectives of the curved world. Volyova supposed they were realistic, but having never seen real clouds with her own eyes, at least not from below, she could not be wholly sure.

And then there were Conjoiners: descendants of an experimental clique on Mars who had systematically upgraded their minds, swapping cells for machines, until something sudden and drastic had happened. In one moment, they had escalated to a new mode of consciousness—what they called the Transenlightenment—precipitating a brief but nasty war in the process.

The Jugglers had been a curiosity for more than a century. They existed on a number of worlds, all of them dominated by single planet-sized oceans. The Jugglers were a biochemical consciousness distributed through each ocean, composed of trillions of co-acting micro-organisms, arranged into island-sized clumps. All the Jugglers” worlds were tectonically active, and it was theorised that the Jugglers drew their energy from hydrothermal outlet vents on the seabed; that the heat was converted to bioelectrical energy and transferred to the surface via tendrils of organic superconductor draping down through kilometres of black cold. The Jugglers” purpose—assuming they had a purpose—remained completely unknown.