For years, Jean Béliveau walked from country to country, with the goal of circumnavigating the globe on foot. While few people have the time or desire to walk such extreme lengths, research shows that adding even a modest amount of walking to your daily routine can dramatically improve your health. So, what exactly happens to your body when you increase your step count? Shannon Odell investigates. Lesson by Shannon Odell, directed by Avi Ofer.

The year is 1030 CE. Chu Hong's best friend, Liang Gao, tells him that the local magistrate has been spotted holding a surprise archery competition in a nearby town and will arrive at their village soon. This is Hong’s chance to showcase his talents in martial arts— and secure some much-needed money for his family. Peter Lorge outlines a day in the life of a Chinese martial artist. Lesson by Peter Lorge, directed by KERO Animation.

No substance has been as constant an ally to insidious scheming as arsenic, the so-called “king of poisons.” In its chemically pure form, it isn’t much of a threat because our bodies don’t absorb it well; it’s when arsenic combines with other elements that things get dangerous. So, how did this substance become such a popular poison? Neil Bradbury digs into the element's sordid and lethal history. Lesson by Neil Bradbury, directed by Luisa Holanda.

In 1935, researchers found that after removing the frontal lobes of two chimps, they no longer experienced frustration or anxiety. Neurologist Egas Moniz believed that replicating this in humans could cure mental illness— leading to one of the most controversial and destructive medical treatments of the 20th century: the lobotomy. Jenell Johnson uncovers the history of the procedure. Lesson by Jenell Johnson, directed by Anton Bogaty.

Today, rats are often regarded as the most successful invasive species in the world. The most common species of rat scurried onto the scene roughly 1 to 3 million years ago in Asia. There, they craftily survived Earth’s most recent ice age, and eventually, began living around and with humans— though often at the mercy of human priorities. Max G. Levy traces the entangled history of human and rat. Lesson by Max G. Levy, directed by Denys Spolitak.

In 1968, the American Heart Association made an announcement that would influence people’s diets for decades: they recommended that people avoid eating more than three eggs a week. Their reasoning was that the cholesterol packed into egg yolks could increase cardiovascular disease risk. So, what exactly is cholesterol? And is it actually bad for you? Hei Man Chan digs into this complex molecule. Lesson by Hei Man Chan, directed by Igor Ćorić, Artrake Studio.

Moore’s Law states that every 1 to 2 years the number of transistors that can fit on a given size computer chip will double. Thanks to this law, chips have gotten smaller, faster, more efficient, and cheaper. But today, there are four key problems that trip up this trend, potentially ending Moore’s Law and fundamentally changing how computing progresses. Sajan Saini and George Zaidan investigate. Lesson by Sajan Saini and George Zaidan, directed by Jeff Le Bars, JetPropulsion.space.

As of 2022, humans have deforested 17% of the Amazon, and scientists warn that we may be approaching a tipping point. It’s like removing bricks from a house: take a few and the house remains standing; remove too many and the whole thing will collapse. So, what would happen if the entire Amazon disappeared? Anna Rothschild explores the relationship between this ecosystem and the rest of the planet. Lesson by Anna Rothschild, directed by Upamanyu Bhattacharyya, Otter Studios.

This is episode 1 of the animated series, “Ada.” This 5-episode narrative follows the young library assistant Ada as she juggles two worlds: her daily mundane reality and the future she vividly imagines for all humanity. Traveling through her visions of potential futures, Ada grapples with the ethical and social implications of new technologies and how they could shape the world. Written by Elizabeth Cox, directed by Elizabeth Cox & Kirill Yeretsky.

Many of us have experienced feeling stuck. People often report feeling highly motivated at the start and end of a project, but the middle can feel untethered. It can happen when tackling something as simple as a term paper or as monumental as social inequality or the climate crisis. So, are there ways to get unstuck? Shannon Odell digs into the psychology of overcoming your motivational obstacles. Lesson by Shannon Odell, directed by Avi Ofer.

This is episode 2 of the animated series, “Ada.” This 5-episode narrative follows the young library assistant Ada as she juggles two worlds: her daily mundane reality and the future she vividly imagines for all humanity. Traveling through her visions of potential futures, Ada grapples with the ethical and social implications of new technologies and how they could shape the world. Written by Elizabeth Cox, directed by Elizabeth Cox & Kirill Yeretsky.

After witnessing a bird carrying a single golden hair, King Mark of Cornwall declared his future bride must have equally radiant locks. The only royal matching this description was Princess Isolde of Ireland. So the king sent Tristan, his bravest knight, to extend an olive branch to the royal family and deliver his proposal of marriage. Iseult Gillespie shares the tale of Tristan and Isolde. Lesson by Iseult Gillespie, directed by Ciara Nolan, Paper Panther.

This is episode 3 of the animated series, “Ada.” This 5-episode narrative follows the young library assistant Ada as she juggles two worlds: her daily mundane reality and the future she vividly imagines for all humanity. Traveling through her visions of potential futures, Ada grapples with the ethical and social implications of new technologies and how they could shape the world. Written by Elizabeth Cox, directed by Elizabeth Cox & Kirill Yeretsky.

When reading "Alice's Adventures in Wonderland," most readers visualize the queen’s croquet game play out in their heads. A few might see the scene in vivid detail. However, a small fraction of readers have a drastically different experience: within their heads, they "see" absolutely nothing. Why do some people have an inability to visualize images? Adam Zeman explores the science of aphantasia. Lesson by Adam Zeman, directed by Biljana Labović. Animation by Manon David.

This is episode 4 of the animated series, “Ada.” This 5-episode narrative follows the young library assistant Ada as she juggles two worlds: her daily mundane reality and the future she vividly imagines for all humanity. Traveling through her visions of potential futures, Ada grapples with the ethical and social implications of new technologies and how they could shape the world. Written by Elizabeth Cox, directed by Elizabeth Cox & Kirill Yeretsky.

Globally, we produce more than a trillion computer chips every year. Which means about 20 trillion transistors are built every second— and this process is done in fewer than 500 fabrication plants. How do we build so many tiny, intricately-connected devices, so incredibly fast? George Zaidan and Sajan Saini explore how photolithography helps build these devices and its environmental impact. Lesson by George Zaidan and Sajan Saini, directed by Kozmonot Animation Studio.

This is episode 5 of the animated series, “Ada.” This 5-episode narrative follows the young library assistant Ada as she juggles two worlds: her daily mundane reality and the future she vividly imagines for all humanity. Traveling through her visions of potential futures, Ada grapples with the ethical and social implications of new technologies and how they could shape the world. Written by Elizabeth Cox, directed by Elizabeth Cox & Kirill Yeretsky.