Sahara
- Episode aired Dec 15, 2009
- TV-PG
- 45m
Scientists present evidence that the Sahara Desert periodically transitions from desert to a lush green environment and back. They also present theories about why this happens.Scientists present evidence that the Sahara Desert periodically transitions from desert to a lush green environment and back. They also present theories about why this happens.Scientists present evidence that the Sahara Desert periodically transitions from desert to a lush green environment and back. They also present theories about why this happens.