How Old Is It

This is the 4th in a series of video books:

• Cosmological Fundamentals
• Big Bang ΛCDM Cosmology
• The Era of Reionization
• How Old are Stars
• How Old is the Earth-Moon System
• How Old is the Solar System
• How Old is Life

There is also a Preface that outlines the content, and a Credits and Research segment with resources that can be used for further research by interested students.