Cambrian
Geologic period
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The Cambrian is the first geological period of the Paleozoic Era, and of the Phanerozoic Eon. The Cambrian lasted 53.4 million years from the end of the preceding Ediacaran period 538.8 Ma to the beginning of the Ordovician Period 485.4 Ma. Its... Wikipedia
Occurred: 541 (+/- 1) million years ago - 485.4 (+/- 1.9) million years ago
Predators: Anomalocaris
Fossils: CMN 344
Era: Paleozoic
Epochs: Terreneuvian, Cambrian Series 2, Miaolingian, and more
Celestial body: Earth
Chronological unit: Period