Some of the nations top neuroscientists uncover new evidence of our brain's ability to change.

Discover the science behind people who push themselves to the limits of human performance.

How did life arise on Earth? What separates humans from apes? Will machines one day invent themselves? Learn more here.

Learn about advances in the repair and replacement of the hard-working heart.

Why can't you tickle yourself? Is laughter uniquely human? These little questions might have some big answers.

Alan Alda learns that sometimes saving endangered species requires restoring whole ecosystems.

Researchers are uniting biology and technology to give hope to the paralyzed.

Get to know chimpanzees, how they socialize with each other, new dangers they face, and just how similar our species truly are.

Join aviation engineer Paul MacCready and Alan Alda as they test fly a variety of unconventional planes.

Alan Alda explores the real science behind fad foods, eating habits and lifestyles.