To start off the exhibit is the Precambrian period. The Precambrian period lasted for 4 billion years. Scientists believe that this period where 90%of earth's history was discovered. Life first started evolving, and progresses and changed the planet. Scientists discovered the truth about organic compounds, the first prokaryotic cells and the first meteorites to hit the earth. Scientists believe that some of these meteorites gave rise to organic compounds, or life's building blocks. The Cambrian Period lasted from 541 to 485 million years ago. Scientist discovered here that the first signs showed up in water. This led to the discovery of the first exoskeletons and new animals that were appearing in the Caribbean seas. This period had a lot of
