"Mind Wave." The Earth and all intelligent living organisms inhabiting it are facing an unprecedented danger: cosmic radiation affecting the neurons of the brain forces the brain to work with unprecedented intensity, which means that the entire edifice of world civilization will inevitably shake. “The Long Road Home.” American engineer-astronauts of the mid-21st century, having made a test flight with a new engine, upon returning home are surprised that the outlines of the continents on Earth have changed, and the Sun has moved from its usual place... “The Planet From Which They Don’t Return.” The contradictions of civilizations alien to each other, the mysteries of a missing expedition, a government conspiracy - and earthlings who are gradually throwing off the bonds of inert thinking and turning into real pioneers.