What's behind a pulse? The second episode dives into the world of an ice climber, a bus driver, a woman in labor, and a senior dance club to show how the human heart and the circulatory system power our physical and emotional lives, and create the pulsing rhythm of our world.

As World War II drags on into another bitter winter the Allies become desperate to end the conflict. Winston Churchill turns to his formidable bomber force to break the deadlock.
The population of an eastern German city is caught in a devastating firestorm and harnessed by the Nazis; the controversy turns the Allies on themselves.

Space colonization is no longer the fodder of science fiction, it is becoming a reality. Examine the efforts underway to establish a human colony on Mars, including how they plan to grow food, recycle wastewater and introduce greenhouse gases to revive the red planet and make it more habitable for humans. Cutting-edge computer graphics are used to bring the universe down to earth to show what life would be like on Mars, and to imagine what kind of life forms might evolve in alien atmospheres.

La mer means, simply, 'the sea.' Ludo came up under mentors like Alain Passard and Mark Meneau, chefs with an almost pathological obsession with ingredients. His eyes light up when he describes the Lobsters of Brittany, the Oysters from Cancale, and the myriad of other extraordinary culinary jewels.
In this episode, we explore how the oceanic bounty of France is some of the best anywhere by profiling the ingredients that can be pulled from it.

Global CO2 emissions coming from aviation will go from about 2% to, by 2050, something closer to 20%. Technology is the only key to open up a brighter future that can be sustainable at the same time. The way we fly is about to change, driven by a new breed of aviators not afraid to think differently. From clean, green electric aircraft to autonomous sky taxis, could the days of the jet age be numbered?

When Japan’s military expansion in the Pacific reaches its fever pitch, Roosevelt is forced to act. By cutting off oil supplies, he hopes to force Japan to back down. But far from sedating their imperial expansions, he pushes them to take one of the greatest gambles in military history – taking their entire striking fleet 4000 miles across the Ocean to attack the American Pacific fleet in Pearl Harbor. It’s a huge gamble, and if it goes wrong, it will spell suicide for Japan.