Yukushi said:
About the gamma radiation and such, I'm not sure what Maya and the Colloid has anything to do with it. If the Earth will not die from the radiation, what is the point of the Colloid?
The gamma rays will make earth unhabitable for humans, basically killing humanity off. The colloid is to digitise humans so that the race can continue to exist, albeit not in traditional physical form anymore.
That's what I'm getting from the story anyway, it's almost identical to Greg Egan's Disapora which I mentioned above. But in that novel the threat is from an exploding binary star, and in this manga it's some weird object that just appeared in the solar system which needs explaining.