No.1a of 7. Darwin?s "dangerous idea" on evolution matters perhaps even more today than it did in his own time.

No.1b of 7. Why Darwin?s "dangerous idea" matters perhaps even more today than it did in his own time, and how it conveys the power of science to explain the past and predict the future of life on earth.

No.2 of 7. What triggered the incredible diversity of life on earth, and how have complex life forms, including humans, evolved? Is there direction to evolution? And is human intelligence inevitable? We focus on evolution?s "great transformations"--among

No.3 of 7. Some 99.9 percent of all the species that have ever lived are now extinct.

No.3 of 7. "Survival of the fittest." Raw competition? Or, a level of cooperation indispensable to life? Evolution tells us that both are important.

No.5 of 7. In evolutionary terms, sex is more important than life itself--without progeny, we are evolutionary losers.

No.6 of 7. Anatomically modern humans existed more than 100,000 years ago, but with crude technology, no art, and primitive social interaction. By 50,000 years ago, something had happened which triggered a creative, technological, and social explosion--an

The chimpanzee community interacting within their enclosure.

Dr. Manuel Berdoy, a zoologist at Oxford University, released 50 laboratory strains of the domestic Brown Rat back into a controlled wild environment in order to show that generations of domestication have not removed a rats natural range of behaviours.

No.7 of 7. Of all the species on earth, only humans try to explain who they are and how they came to be, through the prisms of both science and religion. Today, the theory of evolution is dogged by this tension.