The dome that crowns Florence's great cathedral of Santa Maria del Fiore, the Duomo, is a masterpiece of Renaissance ingenuity and an enduring source of mystery. Still the largest masonry dome on earth, it is taller than the Statue of Liberty and weighs as much as an average cruise ship. Historians and engineers have long debated how its architect, Filippo Brunelleschi, kept the dome perfectly aligned and symmetrical as the sides rose and converged toward the center." More than four million bricks could collapse at any moment -- and we still don't understand how Brunelleschi prevented it. To test the latest theories, a team of U.S. bricklayers will help build an experimental "mini-Duomo" using period tools and techniques.

This episode includes footage of wildlife inhabiting underwater kelp forests, thousands of giant cuttlefish spawning along a restricted area of rocky reef off the south coast of Australia. Males outnumber females 11 to one, which leads to fierce competition. Larger males use brute force to drive off competition, while their smaller rivals use deception by mimicking the appearance of females. The programme also features tiger sharks hunting for green turtles in fields of seagrass and spider crabs trying to avoid predators while they shed their shells.

Mixing comedy with a thorough investigation of psychedelics, the film explores the pros, cons, science, history, future, pop cultural impact, and cosmic possibilities of hallucinogens. The documentary features comedic tripping stories from A-list actors, comedians, and musicians. Star-studded reenactments and trippy animations bring their surreal hallucinations to life.
'Have a Good Trip' tackles the big questions: Can psychedelics have a powerful role in treating depression, addiction, and helping us confront our own mortality? Are we all made of the same stuff? Is love really all we need? Can trees talk?

Eric C. Conn became a local celebrity and maybe even became heroic in the eyes of the people they were helping. He put up billboards all over the county and his parties were legendary. Conn took monthly vacations to exotic locations as a sex tourist and his 16 marriages were the talk of the town.
In the third episode, a new U.S. attorney begins working the case. Things take a dark turn when several of Conn's former clients share their experiences. Wanted by the FBI, chased by the authorities, the story soon spirals into a twisty-turny thriller. That’s no coincidence either, given Conn mentions numerous times that he likens himself to James Bond. James Bond with a dash of Robin Hood.

Scientists on the BICEP and Planck missions are attempting to solve a mystery about the earliest moments of our universe, by searching for patterns in the Cosmic Microwave Background (CMB). If successful, the missions will help to answer the biggest question anyone can ask: how did our universe begin?

Everywhere we look in the most hospitable of environments and in the most extreme we find life. On Earth, life exists everywhere we look. Yet we have only ever found life on our planet. How did the stuff of stars come together to create life as we know it? What do we really mean by 'life'? And will unlocking this mystery help us find life elsewhere?