Who are you? Do you even know who you are? Are you your memories? Are you the choices you make? Are you you? Or are you someone else, but manipulated to be you? If you can lose track of your past and your memories can be altered or implanted, in the end, who are you really? Michael Stevens finds out as he explores what makes you you.

Your brain is like a hungry sponge. It's constantly absorbing information. It thrives when stimulated. Between smartphones and books, and movies, and friends and family, thousands of sensations are constantly going into our heads. But what if it all got cut off?. Imagine being confined to a 10-by-10-foot room in complete isolation. No timekeeping devices, no phones, no books, nothing to write on, no windows. Psychologists say that fewer than three days in a room like this can lead to brain damage. I will be staying in this room for three days.
Michael explores the effects of isolation on the human mind by subjecting himself to a very interesting experiment.

The true, stranger-than-fiction, adventure of eight visionaries who in 1991 spent two years quarantined inside of a self-engineered replica of Earth's ecosystem called Biosphere 2.
The experiment was a worldwide phenomenon, chronicling daily existence in the face of life threatening ecological disaster and a growing criticism that it was nothing more than a cult. The bizarre story is both a cautionary tale and a hopeful lesson of how a small group of dreamers can potentially re-imagine a new world.

A single microscopic brain cell cannot think, is not conscious, but if you bring in a few more brain cells, and a few more, and connect them all, at a certain point, the group itself will be able to think and experience emotions and have opinions and a personality and know that it exists. How can such astonishing things be made from such simple ingredients? Well, answering that question means learning not only who we are but, more importantly, how we are.
Today, using what neuroscientists know so far, we are going to make a town function like a brain, using people as neurons.

After years of anticipation, autonomous vehicles are now being tested on public roads around the world. As ambitious innovators race to develop what they see as the next high-tech pot of gold, some experts warn there are still daunting challenges ahead, including how to train artificial intelligence to be better than humans at making life-and-death decisions.
How do self-driving cars work? How close are we to large-scale deployment of them? And will we ever be able to trust AI with our lives?

It's known as the Alamo of the ancient world, the story of a band of Jewish rebels and their final stand against the Roman Army. The siege of Masada, recorded nearly 2,000 years ago by Jewish military leader Flavius Josephus, is more than a tale of resistance against impossible odds. It's part of the founding narrative of Israel. But how much of it is true?
We take a look at the events that inspired the CBS television miniseries 'The Dovekeepers' and go to the site of the mountain fortress itself, uncovering new truths about this epic conflict.