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History of life on Earth

This course is a part of AP®︎ Biology, a 38-course Topic series from Khan Academy.

Our planet has an amazing history spanning about 4.5 billion years! Learn more about how Earth formed, the early history of life on Earth, and the origins of humans.

This course contains 3 segments:

Formation of Earth and early life

How did Earth form, and what were early life forms like? Learn what we do (and don't!) know about the origins of our amazing planet and the dawn of its diverse inhabitants.

The diversification of life

Life began on Earth at least 3.5 billion years ago. Since then, it's diversified in an amazing way! Learn about important events in the history of living organism on Earth, up to and including the appearance of humans.

Radiometric dating

Geologists and archaeologists will tell you how old things are or when they happened, but how do they know? This tutorial covers some of the primary techniques of "dating" (in the geological, not the romantic, sense!).

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Length 3 segments
Starts On Demand (Start anytime)
Cost Free
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Download Videos On all desktop and mobile devices
Language English
Subjects Science
Tags Science

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Careers

An overview of related careers and their average salaries in the US. Bars indicate income percentile.

Amazing Front Desk $37k

Professor of History Lead $48k

Lecturer of History $50k

Teacher of History $58k

Associate Lecturer in Art History $61k

History $61k

8Th Grade U.S. History Teacher & Department Leader $68k

Assistant Professor of History and Chair $73k

Associate Instructor, Art History $74k

U.S. History Teacher Consultant $80k

Adjunct Instructor History and Political Science $93k

Adjunct Professor of Art Education and Art History $149k

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Khan Academy

Rating Not enough ratings
Length 3 segments
Starts On Demand (Start anytime)
Cost Free
From Khan Academy
Download Videos On all desktop and mobile devices
Language English
Subjects Science
Tags Science

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