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We know more about the Cenozoic era primarily due to its relatively recent timeframe, spanning the last 66 million years, which allows for more extensive fossil records and geological evidence compared to older eras. Additionally, the Cenozoic encompasses the rise of mammals and birds, leading to a rich array of fossils and well-studied ecosystems. Advances in technology, such as radiometric dating and improved paleontological methods, have also enhanced our understanding of this era. Furthermore, human activity and research efforts have focused significantly on environments and species from the Cenozoic, further enriching our knowledge.

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Why are the time periods of the paleozoic subdivided into early middle and late instead of named epochsas they are in the Cenozoic?

The Paleozoic era is subdivided into early, middle, and late periods primarily due to the significant evolutionary and geological changes that occurred during its vast time span, which is longer and more complex than the Cenozoic. These divisions reflect major shifts in biodiversity, climate, and continental configurations. In contrast, the Cenozoic era, being more recent and better understood, allows for more precise naming of epochs based on distinct geological and biological events. This differentiation helps clarify the evolutionary history and environmental conditions of each period.


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We are currently in the 21st century. We entered the 21st century in 2001.


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The planet that contains more than half the mass of the solar system not in the sun?

Jupiter has more mass than all the other planets (in the Solar System) together.Jupiter has more mass than all the other planets (in the Solar System) together.Jupiter has more mass than all the other planets (in the Solar System) together.Jupiter has more mass than all the other planets (in the Solar System) together.


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