543 million years ago
In More Detail:
The Cambrian is the first geologic Period of the Phanerozoic Eon – Phanerozoic means “visible life” in Latin – the Phanerozoic is the geological period where we can see life with our own eyes, without the aid of a microscope. We’re still living in the Phanerozoic, as you might notice you see a living creature!
- For more on the Cambrian, visit UC Berkeley Museum of Paleontology’s website here
- To see the amazing Burgess Shale animals, visit the Smithsonian Institution page here
- For a detailed discussion of the Cambrian Radiation and possible triggers for this momentous event, read Dr. Charles Marshall’s article here.