Yours

Educational195924 min640×480

Long Time Intervals

Educational Services Inc

EducationScience

At the Internet Archive

Clips are not offered for this film: no licence or public-domain mark is recorded for it.

About

Harrison Brown discusses the significance of long time intervals and describes how radioactive dating arrives at an estimate for the age of the earth. For more info on PSSC, its history, and films, visit http://www.afana.org/psscfilms.htm

Human-made No record of this work says a model made it. What this means.

Archive
Internet Archive, in Academic films
Licence or status
The Internet Archive states none for this item.
Rights statement
Education Development Center www.edc.org
Credit
Educational Services Inc
Who can watch
The archive gives no rating. Invisible Network shows it to Kids profiles and older, judged from its collection and subjects. How films are placed