Early LifeThis lession is about how life began and what things were like before early humans appeared.Course Sessions The Early
Future Speculations
This series has eleven video installments. This first installment: Earth Now begins the series with an analysis of present land masses and national
The Moon Begins
Time: 4.5 billion years ago.Place: Earth.It is hot, thousands of degrees hot. We float on red, molten rock. The entire planet is an ocean of