Habrakabr, news about a company that sells the seeds of the shining topol in the dark.

Tavel: In addition, for $10,000 these guys offer to encode any message up to 30 characters long into the plant’s DNA and stay that way in the story if, suddenly, in a hundred years of night Earth will be illuminated by trees:
Zibx: So that’s what we have for junk DNA. Unknown language, standard coding of the Galactic Alliance and a message telling how to make a warp engine and arrive for further instructions.
For some, it cost a lot of space credits.