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53m 17s

Rise of the Mammals

Sixty-six million years ago, an asteroid wiped out the dinosaurs in a fiery global catastrophe. But we know little about how their successors, the mammals, recovered and took over the world. Now, hidden inside ordinary-looking rocks, an astonishing trove of fossils reveals a dramatic new picture of how rat-sized creatures ballooned in size and began to evolve into the vast array of species.

53m 21s

Look Who's Driving

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?

53m 9s

Why Bridges Collapse

In 2018, Italy’s Morandi Bridge collapsed, tragically killing 43 people. For 50 years, the iconic bridge had withstood the elements—and stress from ever-increasing traffic. What went wrong that fateful day? And how can new engineering technology protect bridge infrastructure to prevent such tragic failures in the future?

52m 48s

The Planets: Ice Worlds

In the far reaches of the solar system, Uranus and Neptune dazzle with unexpected rings, supersonic winds, and dozens of moons. And NASA’s New Horizons gets a stunning up-close view of Pluto before venturing deep into the Kuiper Belt.

53m 24s

The Planets: Saturn

NASA’s Cassini explores Saturn for 13 years, looping through its icy rings and flying by its moons. The probe captures stunning ring-moon interactions, but when it finds the ingredients for life on the moon Enceladus, a bittersweet decision is made.

53m 18s

The Planets: Jupiter

Jupiter’s massive gravitational force made it a wrecking ball when it barreled through the early solar system. But it also shaped life on Earth, delivering comets laden with water—and perhaps even the fateful asteroid that wiped out the dinosaurs.

53m 54s

The Planets: Inner Worlds

The rocky planets—Mercury, Venus, Earth and Mars—were born of similar material around the same time. Yet only one of them supports life. Were Earth's neighbors always so extreme? And is there somewhere else in the solar system life might flourish?

53m 54s

The Planets: Mars

Mars was once a blue water-world studded with active volcanoes. But when its magnetic field and protective atmosphere faded, it became the frozen desert planet we know today. With so many necessary elements in place, did life ever form on Mars?

53m 39s

Back to the Moon

Fifty years after humans first set foot on the Moon, new scientific discoveries are fueling excitement for a return to the lunar surface—this time, perhaps, to stay. Join the scientists and engineers working to make life on the Moon a reality.

53m 9s

Lost Viking Army

Bioarchaeologists investigate a ninth-century mass grave in a rural English village. Will the remains unlock the mystery of the “Great Heathen Army,” a legendary Viking fighting force that once invaded England?

53m 9s

First Horse Warriors

Horse riding played a key role in human expansion and civilization. But when and how did people first master these animals? Scientists use archeology and genetics to uncover clues about the first horse riders and how they shaped the world.

53m 16s

Inside the Megafire

The California wildfires of 2018 took a worrisome trend to a new extreme, claiming scores of lives and over a million acres. Scientists investigate how forestry practices, climate change, and drought may contribute to the rise of deadly megafires.

53m 15s

Saving the Dead Sea

As the Dead Sea shrinks, engineers prepare a daring solution: connect it with the Red Sea by way of a massive desalination plant. If it works, it could stabilize the legendary lake and ease regional tensions. But will it put the environment at risk?

53m 10s

The Next Pompeii

In the shadow of Italy’s Vesuvius, a lesser-known volcano rumbles: Campi Flegrei. If it erupts, millions of lives could be at risk. Scientists explore its unique geology and develop a warning system that could prevent Naples becoming the next Pompeii.

53m 42s

Rise of the Rockets

New technologies are making rockets cheaper and more powerful than ever before. As companies like SpaceX and Virgin Galactic make space more accessible, and NASA returns to crewed spaceflight, a new era of space exploration may be on the horizon.

53m 44s

Decoding the Great Pyramid

Stunning new archaeological evidence provides clues about the Egyptians who built the Great Pyramid of Giza--and how they did it. Join researchers as they delve into the logbook of a work crew and discover how the massive project transformed Egypt.

53m 21s

Kīlauea: Hawaiʻi on Fire

Hawaiʻi’s Kīlauea volcano erupted in 2018, sending rivers of lava through communities and into the sea. Join scientists and local residents as they investigate the frightening spike in volcanic activity that turned an island paradise into an inferno.

53m 34s

Einstein's Quantum Riddle

Quantum entanglement is poised to revolutionize technology from networks to code breaking–but first we need to know it’s real. Join physicists as they capture light from across the universe in a bid to prove Einstein’s “spooky action at a distance.”

53m 51s

Pluto and Beyond

Since it explored Pluto in 2015, the New Horizons spacecraft has been zooming toward NASA’s most distant target yet. Join the mission team as the probe attempts to fly by Ultima Thule, an object 4 billion miles from Earth.

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