From 9/11 to today's crowd-sourced violence, trace how terrorists' strategies have evolved.

How the science of learning may change education for all children.

Follow our ancient ancestors' footsteps out of Africa and into every corner of our planet.

Join engineers as they build a massive new railway deep beneath the streets of London.

Gemstones like diamonds, rubies, opal and jade are the ultimate treasures. Delve into Earth's depths to discover how these precious stones are forged and what explains the unique allure of each captivating gemstone.

Gold, bronze, iron, steel... metals are pillars of our civilization, but what makes them so special? Discover their unique properties and explore how our mastery of metals has led us from the stone age to today's hi-tech world.

Drill down to discover how Earth's natural treasures provide bountiful energy to power our modern world yet are also driving us to seek new, cleaner alternatives that can help us keep the lights on.

Scientists explore mountain tombs in the Himalayas, revealing ancient secrets about the people who settled there, including rituals to ward off restless spirits.

A renaissance in nuclear technology grows while a crisis continues at the Fukushima nuclear plant.

Cutting edge researchers hunt for a super battery that can power tomorrow’s high tech world.

Pioneering shipbuilders embark on an epic endeavor to build the ultimate cruise ship.

Discover how the art of origami is sparking a scientific revolution and unlocking nature’s secrets.

Investigate deadly train accidents and join safety experts as they test crash prevention technology.

For centuries, the Lithuanian city of Vilna was one of the most important Jewish centers in the world, earning the title "Jerusalem of the North" until World War II, when the Nazis cuddled about 95% of its Jewish population and reduced its synagogues and cultural institutions to ruins. The Soviets finished the job, paving over the remnants of Vilna's famous Great Synagogue so thoroughly that few today know it ever existed. Now, an international team of archaeologists is trying to rediscover this forgotten world, excavating the remains of its Great Synagogue and searching for proof of one of Vilna's greatest secrets: a lost escape tunnel dug by Jewish prisoners inside a horrific Nazi execution site.

On April 25, 2015, a devastating earthquake rocked Nepal. As it ripped across the Himalayas, it wiped out villages and left thousands dead. Hear the harrowing stories of the Nepalese people who lived near the epicenter and of survivors trapped on Everest. Through dramatic eyewitness footage, expert interviews, and stunning graphics, NOVA reveals the anatomy of this megaquake while scientists race to answer urgent questions-Is another big one just around the corner? What can we learn from the deadly combination of earthquakes and landslides? And can we rebuild to survive the next big one?

For over 1000 years, chariots thundered across China's battlefields - dominating warfare longer than anywhere else on earth. Now, archaeological findings enable a team of experts to reconstruct and test China's first super-weapon.

In this special report, NOVA investigates what happened in Flint, Michigan, when local officials changed the city's water source to save money, but overlooked a critical treatment process. As the water pipes corroded, lead leached into the system, exposing the community-including thousands of children-to dangerous levels of poison. NOVA uncovers the science behind this manmade disaster- from the intricacies of water chemistry to the biology of lead poisoning to the misuse of science itself. Follows ordinary citizens and independent scientists who exposed the danger lurking in Flint's water and confronted those who turned a blind eye. And discover the disturbing truth that reaches far beyond Flint-water systems across the country are similarly vulnerable. How can we protect ourselves from poisoned water?

On August 21, 2017, millions of Americans will witness the first total solar eclipse to cross the continental United States in 99 years. As in all total solar eclipses, the moon will block the sun, revealing its ethereal outer atmosphere-its corona-in a wondrous celestial spectacle. While hordes of citizens prepare to flock to the eclipse's path of totality.