Life on Earth is thought to have arisen approximately 3.8 billion years ago, as simple single-celled bacteria capable of consuming naturally occurring molecules to grow and divide. These early lifeforms are referred to today as prokaryotes, unicellular organisms without membrane-bound organelles. However, much of the life we see around us today is eukaryotic, comprised of trillions of cells that contain organelles separated from the rest of the cell by lipid membranes. The endosymbiotic theory offers a method by which eukaryotes could have evolved from the simple prokaryotes that began life on Earth to the complex interrelated organisms that now shape the way we see our world. Learn more about the endosymbiotic theory by watching this video!

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Transcript:
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Music by Emile van Krieken:

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Song: Wings (Aether 2)
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