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Impact That formed earth's moon
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1st Continents
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1st oceans
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1st rocks
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1st crust solidified
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1st organisms
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1st plants
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1st oxygen
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Photosynthesis begins
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1st atmosphere
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Rodinia forms
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Rodinia breaks apart
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"Snowball" Earth
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1st Fish
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1st vertebrates
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1st winged insects
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1st buterflies
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1st cockroaches
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1st amphibians
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1st Reptiles
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1st birds
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1st dinosaurs
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pangea forms
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1st mammals
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pangea breaks apart
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Dinosaur Extinction
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modern day continents form
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1st large primates
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industrial revolution
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World War 1
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World War 2
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Revolutionary War
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Constitution signed
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Discovery of America
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Grand Canyon Discovered
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Renaissance period
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1st Airplane
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1st automobile
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1st computer
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1st television
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1st motion picture
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City of Frisco founded
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State of texas founded
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frisco High School founded
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1st atomic bomb