How did the life evolved on earth? Perhaps this is one of the few questions whose answer can vary from one person to another. I recently found the video on http://www.clipta.com/Evolution_of_Life_on_Earth_Carl_Sagan__v1838451701 focusing on the evolution of life on earth narrated by Carl Sagan. The six minute video was really impressive and made be more excited to know more. The video had tried to explain the 4 billion years of evolution condensed into 6 minutes. The picture quality was excellent with clear audio. This is definitely one of the best videos, I found on clipta.com