This story by Arthur C. Clarke packs a powerful message into just two pages. It takes the form of a radio message reassuring the people of Earth that they have nothing to fear from a group of beings approaching from space. The visitors claim to share a common ancestry with man, both being descended from an advanced race of aliens who colonized Earth during the time of the dinosaurs. Those who could fled when a terrible genetic plague brought on division, conflict and savagery among the population. They are returning with a cure for any who might still be affected.
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