The inner planets have been explored, even colonized. Men and women live for centuries, but only remember their most recent years. The outer edges of the solar system are finally being explored.
The first expedition to Pluto finds a towering monument of ice at the planet's pole Gleaming in the dim light of the distant sun, the mysterious circle of monoliths challenges all official, accepted history.
For someone, somewhen in a past that humankind no longer remembers, was here. Icehenge was built by human hands.
