There’s no chance that everything that exists will last forever. Powerful civilizations have turned to dust, leaving behind a handful of ancient monuments and unclear records. So will we someday pass into oblivion, and the looters—proudly calling themselves “archaeologists”—will wander through ruined cities overgrown with grass and trees. Or maybe they won’t, because wandering around a nuclear dump even in the suits with the highest level of protection is impractical. But humanity keeps searching for new horizons. Desperate lone strivers make breakthroughs, trying to open a door for millions. That’s how the Internet was invented: made for themselves, and it turned out for everyone. That’s how airplanes and electricity appeared. And in exactly this way one physicist opened a passage into another world…