Instructional Video

Crash Course History of Science #20: Earth Science

Curated by ACT

How did scientists figure out the age of the earth? Trace the history of Earth Science and the developments scientists made in determining the earth's geologic eras. Scientists asked such questions like, what's up with fossils? Are they the remains of extinct organisms? Or are they rocks that don't mean anything? Analyze the different theories scientists used to answer such questions in this video. [13:43]

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