# Hidden Earth

Produced in cooperation with the WGBH Educational Foundation

With teacher's guide

Traces the history of man's endeavors to study the earth's interior and describes modern instruments and techniques. Explains the significance of volcanic eruptions and earthquakes. Discusses theories regarding the origin of the solar system, the changes in the surface of the earth, the earth's heat flow, Operation Mohole, and the value of seismic exploration of the moon

- Kind: Educational
- Year: 1960
- By: National Academy of Sciences (U.S.), McGraw-Hill Book Company
- Genres: Education, Industrial and advertising
- Archive: [Internet Archive](https://archive.org/details/hiddenearth_201703)
- Licence or status: none stated by the archive
- Who can watch: Kids profiles and older (the archive gives no rating; placed by Invisible Network from its collection and subjects)

[Watch now](https://invisiblenetwork.ai/watch/archive/ia/hiddenearth_201703?play=1)