Procyon

…The Procyons were winning until the reptilians deployed their ultimate weapon, a copper fusion bomb. It detonated in the Yucatan. They expected it to kill all surface life while preserving mineral deposits, but something went wrong. Earth's seawater triggered a chain reaction, and the nuclear winter lasted 200 years. And most dinosaurs died, but some escaped…

…According to Lacerda, two alien species discovered Earth at the same time millions of years ago. Humanoids from Procyon arrived first. They built copper mines in Antarctica and Asia, and their ships filled the skies. Then another species arrived, reptilians with their own copper fusion technology, and they wanted Earth's copper. The Procyons refused to shar…