Evolution

Intelligence is the defining trait of our species. Discover how our sophisticated human brains--and those of our clever animal cousins like the dolphin--evolved from the time when our ancestors were tiny senseless sea creatures. From NOVA.

The relentless pursuit of energy, the very act of eating, has profoundly shaped life on Earth. Discover the surprising story of how our planet's diverse creatures became the furious feeding machines they are today, one mutation at a time. From NOVA.

From the 1st time 2 cells stuck together, evolution has been crafting new bodies--biological machines put to the test by Earth's ever-changing environments. Discover the process behind the variety of animal shapes and sizes. From NOVA.

Discover how the rise of sexual reproduction--with each new generation a roll of the genetic dice--fuels staggering diversity, pushing life to specialize and shaping everything from tiny single-celled organisms to towering ostriches. From NOVA.