Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/humanities/world-history/world-history-beginnings/origin-humans-early-societies/v/history-and-prehistory

How do we know what we know about prehistory, the time before the invention of writing? Sal explains.

Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/world-history/history-beginnings/origin-humans-early-societies/e/knowing-prehistory-exercise

Watch the next lesson: https://www.khanacademy.org/humanities/world-history/history-beginnings/origin-humans-early-societies/v/peopling-the-earth

World History on Khan Academy: From prehistory to today, this course covers the human events that have shaped our planet.


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