Series Info & Airtimes
 
Geologic Time
This episode examined efforts to determine the age of the Earth. It examined James Huttons study of rock layers and the process by which they were formed; the value of measuring radioactive decay; and the wide variations in the planets estimated age.
 
Episode Guide
 
 
CC - Closed Caption
HD - High Definition
16:9 - Anamorphic Widescreen
LTR - Letterbox
DVI - Descriptive Video Information for the visually impaired