Junk Civilization

In 2147, an object of unknown origin broke into the solar system, dumped material in the orbit of Jupiter, and then turned around and left. Humanity salvaged technology from the dump that transcended cognition: unanalyzable materials, self-assembling structures, black matter squirming in the vacuum. All the rules of civilization began to loosen. But there is one question that always hangs over all the discoveries - Why are they throwing it away?