Ozone layer and eukaryotes show up in the Proterozoic eon

Is there a sentence fragment?During the Precambrian period, m... | Filo

At the beginning of the Precambrian, Earth was a harsh and unpredictable place. Volcanic eruptions, meteor strikes, and extreme heat made it impossible for complex life to exist. After millions of years, the surface cooled, oceans began to form, and the first life forms appeared. Learn more about these early life forms in our new First Life exhibit, open now! #FirstLife #science #newexhibit #museum #Alberta #Canada | Royal Tyrrell Museum of Palaeontology

Precambrian Era Timeline & Facts

What plants and animals lived in the Precambrian era? - TimesMojo

Geology - Grand Canyon National Park (U.S. National Park Service)

5.8M views · 78K reactions | The giant boulder opal color is crazy Video credit ©️ boulderopalbill #geology #gems #gemstones #gemstone #boulderopalsplits #jewel #jewelry #opalspecimens #raregemstones #boulderopal #boulderopals #boulderopalroughjjj #opals #opal | Million Years Crystal | Facebook