Gray Tide?
Shen Feng's eyes narrowed as a thought instantly struck him.
'The *Nanomechanical Principles* book!'
He had actually heard the term "Gray Tide" before.
It was mainly mentioned in the hodgepodge of apocalyptic sci-fi novels he had read.
When nanotechnology first emerged, many people made pessimistic predictions, including the concept of a Gray Tide apocalypse.
Simply put, it was a scenario where the massive development of nanomechanical technology could lead to the emergence of tens of millions, hundreds of millions, or even billions of nanometer-scale robots, forming a collective swarm.
This technology could deconstruct, reassemble, and build objects at the molecular level, making it far more powerful than 3D printing.
Each tiny nanorobot was its own individual factory.
