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The Cenozoic Era - PowerPoint PPT Presentation


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The Cenozoic Era. The Cenozoic era started 65 mya – present day We are still in the Cenozoic era “The Age of Mammals”. Cenozoic Life Mammals dominate ; dinosaurs (a major predator of mammals) are extinct so mammals can flourish. What are Mammals?

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Presentation Transcript
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The Cenozoic era started 65 mya – present day

We are still in the Cenozoic era

“The Age of Mammals”

slide3

Cenozoic Life

  • Mammals dominate; dinosaurs (a major predator of mammals) are extinct so mammals can flourish
slide4

What are Mammals?

  • Mammals are warm-blooded (steady body temperatures), have live babies (no eggs), and are covered with hair or fur
  • The first mammals were small but they evolved during the Cenozoic to:
    • Larger sizes
    • Bigger brain capacities
    • Specialized teeth per their diet
    • Specialized limbs per their environment
slide5

What allowed Mammals to Evolve?

  • Few predators on land
  • The evolution of things like
    • Grasses– for grazers like cow/deer/horses
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Large mammals evolved like:

    • Hornless rhino
    • Wooly mammoth
    • Saber-toothed cats
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During the Cenozoic, there were also many ice ages (periods of time when large parts of the continents were covered with ice sheets)

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Human Evolution

  • Our first ancestors evolved about 3.5 mya
  • Modern day humans evolved about 100,000 years ago (likely migrated from Africa)
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Precambrian Era

4.6 bya -540 mya

Paleozoic Era

540 mya -248 mya

Mesozoic Era

248 mya – 65 mya

Cenozoic Era

65 mya - present