Audience: Students; Grades: 9-12; Subject: Science. (2013) Explore the history of life from its humble beginnings as single-celled organisms, to its great blossoming and proliferation, which took place over the course of eons. With the help of state of the art computer graphics, the world's foremost paleontologists and biologists help unravel the greatest mysteries of life. Mating ? The Search for the Other Half One of the most profound mysteries in the world, love between males and females, is explored. What was the evolutionary impetus which gave rise to love? Through an experiment involving the chlamydomonas, we recreate the fateful moment 25 billion years ago when genders first appeared.