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![Page 1: History of Life on Earth. Fig. 25-7 Animals Colonization of land Paleozoic Meso- zoic Humans Ceno- zoic Origin of solar system and Earth Prokaryotes Proterozoic](https://reader036.vdocument.in/reader036/viewer/2022072006/56649f565503460f94c7a1c8/html5/thumbnails/1.jpg)
History of Life on Earth
![Page 2: History of Life on Earth. Fig. 25-7 Animals Colonization of land Paleozoic Meso- zoic Humans Ceno- zoic Origin of solar system and Earth Prokaryotes Proterozoic](https://reader036.vdocument.in/reader036/viewer/2022072006/56649f565503460f94c7a1c8/html5/thumbnails/2.jpg)
Fig. 25-7
Animals
Colonizationof land
Paleozoic
Meso-
zoic
Humans
Ceno-zoic
Origin of solarsystem andEarth
ProkaryotesProterozoic Archaean
Billions of years ago
1 4
32
Multicellulareukaryotes
Single-celledeukaryotes
Atmosphericoxygen
![Page 3: History of Life on Earth. Fig. 25-7 Animals Colonization of land Paleozoic Meso- zoic Humans Ceno- zoic Origin of solar system and Earth Prokaryotes Proterozoic](https://reader036.vdocument.in/reader036/viewer/2022072006/56649f565503460f94c7a1c8/html5/thumbnails/3.jpg)
• Oparin and Haldane hypothesized that the early atmosphere was highly electrical
• Stanley Miller and Harold Urey conducted lab experiments that showed that the abiotic(non-living) synthesis of organic molecules in the early atmosphere is possible
• They spent years researching and trying to recreate a closed system that mimic what they believed to be the conditions of early Earth.