Science

Journey of a Man answers the question, "Where do we all come from?" Today, some six billion people are spread across the planet. But there was a time-not so long ago-when the human species numbered only a few thousand and their world was a single continent: Africa.

There has always been a struggle to balance the goals of economic development with the need to protect the environment. With world population growing and global climate change threatening to affect us all, never has that balance been more important. Today, the developed world uses much of the world's energy resources and contributes to the majority of global greenhouse gases.

Join best-selling author Steven Johnson to discover extraordinary stories behind six remarkable ideas that made modern life possible, the unsung heroes who brought them about, and the unexpected and bizarre consequences each of these innovations triggered. Explore the history and power of these great ideas: Clean, Time, Glass, Light, Cold, and Sound.

NOVA reveals the minute-by-minute story of the Fukushima nuclear crisis—the one you know about, and the one you likely don't; the perilously close call at the other Fukushima nuclear power plant a few miles away from the meltdowns.

The Bomb tells the story of the most powerful and destructive device ever invented. Learn how humans harnessed this incredible power and what challenges we have faced living with it since 1945.

The National Football League, a multibillion-dollar commercial juggernaut, presides over America's indisputable national pastime. But the NFL is under assault as thousands of former players claim the league has covered up football's connection to long-term brain injuries.