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![Arctic Dinosaurs](/wgbh/nova/images03/ticon_3511_arcticdino.jpg) | Arctic Dinosaurs Experts in Alaska investigate how dinosaurs managed to thrive in polar regions. |
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![Balloon Race Around the World](/wgbh/nova/images03/ticon_2313_threemen.jpg) | Balloon Race Around the World Delve into the history and science of ballooning, and follow some of the attempts in the '90s to be the first to circumnavigate the globe. |
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![The Big Energy Gamble](/wgbh/nova/images03/ticon_3519_energy.jpg) | The Big Energy Gamble Can California's ambitious plan to cut greenhouse gases actually succeed? |
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![NOVA scienceNOW: Booming Sands](/wgbh/nova/images03/ticon_3204_04_sand.jpg) | NOVA scienceNOW: Booming Sands Scientists look into a generations-old conundrum: how and why do certain sand dunes produce mysterious noises? |
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![Cracking the Ice Age](/wgbh/nova/images03/ticon_2320_ice.jpg) | Cracking the Ice Age Did the crash of continents that produced the Himalayan Mountains also trigger the Ice Age? |
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![Deadly Shadow of Vesuvius](/wgbh/nova/images03/ticon_2515_vesuvius.jpg) | Deadly Shadow of Vesuvius The shattered remnants of the Roman city of Pompeii bear witness to the risk that the people of Naples still face today. |
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![Descent Into the Ice](/wgbh/nova/images03/ticon_3104_mtblanc.jpg) | Descent Into the Ice A team of "glacionauts" ventures into a labyrinth of unexplored and hazardous glacier caves on France's Mt. Blanc. |
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![Diamond Deception](/wgbh/nova/images03/ticon_2703_diamond.jpg) | Diamond Deception Makeshift labs in China and Russia are turning out synthetic gemstones that rival natural diamonds. |
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![NOVA scienceNOW: Diamond Factory](/wgbh/nova/images03/ticon_0401_01_nsn.jpg) | NOVA scienceNOW: Diamond Factory Visit a laboratory where entrepreneurs are growing perfectly pure diamonds. |
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![Dimming the Sun](/wgbh/nova/images03/ticon_3310_sun.jpg) | Dimming the Sun New evidence that air pollution has masked the full impact of global warming suggests the world may soon face a heightened climate crisis. |
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![NOVA scienceNOW: Dinosaur Plague](/wgbh/nova/images03/ticon_0403_01_nsn.jpg) | NOVA scienceNOW: Dinosaur Plague Insects caught in amber spark a controversial theory about what killed the dinosaurs. |
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![Everest](/wgbh/nova/images03/ticon_2702_everest.jpg) | Everest Take a virtual climb of Mt. Everest through panoramic photography and explore the personalities, dangers, and history associated with the mountain. |
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![Extreme Ice](/wgbh/nova/images03/ticon_3604_extremeice.jpg) | Extreme Ice An acclaimed photographer teams up with scientists to document the runaway melting of arctic glaciers. |
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![Fire Wars](/wgbh/nova/images03/ticon_2908_fire.jpg) | Fire Wars Wildland firefighters battle one of the most destructive fire seasons in U.S. history. |
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![Flood!](/wgbh/nova/images03/ticon_2307_flood.jpg) | Flood! The Great Flood of 1993 leaves a wake of destruction across the Midwest. Can rivers ever be contained? |
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![Hawaii Born of Fire](/wgbh/nova/images03/ticon_2211_hawaii.jpg) | Hawaii Born of Fire From their blistering beginnings as molten rock, the Hawiian islands have grown into a verdant paradise of unique lifeforms. |
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![Hunt for the Supertwister](/wgbh/nova/images03/ticon_3107_tornado.jpg) | Hunt for the Supertwister Tornado-chasing scientists with an eye to better forecasting risk their lives to plumb the secrets of nature's most terrifying killer. |
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![NOVA scienceNOW: Hurricanes](/wgbh/nova/images03/ticon_3204_02_hurr.jpg) | NOVA scienceNOW: Hurricanes Predicting a hurricane's intensity is notoriously difficult, but new tools may make it easier. |
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![Into the Abyss](/wgbh/nova/images03/ticon_2609_abyss.jpg) | Into the Abyss A daring expedition attempts to retrieve several "black smoker chimneys" from the seafloor a mile and a half down. |
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![Jewel of the Earth](/wgbh/nova/images03/ticon_3305_jewel.jpg) | Jewel of the Earth David Attenborough probes the mysteries of ancient life-forms perfectly preserved in amber. |
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![Magnetic Storm](/wgbh/nova/images03/ticon_3016_magnetic.jpg) | Magnetic Storm Is the magnetic field protecting Earth from deadly radiation about to reverse direction or even disappear? |
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![NOVA scienceNOW: Mass Extinction](/wgbh/nova/images03/ticon_3318_01_nsn.jpg) | NOVA scienceNOW: Mass Extinction What caused the mother of all extinctions 250 million years ago? |
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![Megabeasts' Sudden Death](/wgbh/nova/images03/ticon_3607_clovis.jpg) | Megabeasts' Sudden Death Scientists propose a radical new idea of what killed off mammoths and other large animals at the end of the Ice Age. |
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![Mountain of Ice](/wgbh/nova/images03/ticon_3005_vinson.jpg) | Mountain of Ice Jon Krakauer and fellow mountaineers pioneer a new route on a scientific expedition up Antarctica's highest peak. |
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![Mysterious Life of Caves](/wgbh/nova/images03/ticon_2910_caves.jpg) | Mysterious Life of Caves Toxic caverns teeming with strange life-forms spark a radical theory of how caves take shape. |
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![Mystery of the Megaflood](/wgbh/nova/images03/ticon_3211_megafloo.jpg) | Mystery of the Megaflood What unleashed a catastrophic flood that scarred thousands of square miles in the American Northwest? |
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![Mystery of the Megavolcano](/wgbh/nova/images03/ticon_3312_megavolc.jpg) | Mystery of the Megavolcano Researchers from Indonesia to Greenland unearth clues to the greatest volcanic eruption of the last 100,000 years. |
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![Origins](/wgbh/nova/images03/ticon_3111_origins.jpg) | Origins Journey back to the beginning of everything: the universe, Earth, and life itself. |
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![NOVA scienceNOW: Secrets in the Salt](/wgbh/nova/images03/ticon_0405_02_nsn.jpg) | NOVA scienceNOW: Secrets in the Salt Salt deposits that formed 250 million years ago hold tantalizing hints of early life. |
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![Sinking City of Venice](/wgbh/nova/images03/ticon_2914_venice.jpg) | Sinking City of Venice Experts struggle to save the City of Canals before it vanishes beneath the waves. |
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![Storm That Drowned a City](/wgbh/nova/images03/ticon_3218_orleans.jpg) | Storm That Drowned a City Experts and eyewitnesses reconstruct the devastating floods that Hurricane Katrina unleashed on New Orleans. |
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![NOVA scienceNOW: Profile: Lonnie Thompson](/wgbh/nova/images03/ticon_0405_04_nsn.jpg) | NOVA scienceNOW: Profile: Lonnie Thompson A climatologist struggles to save ancient history preserved in ice that is now melting. |
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![Tracking El Niño](/wgbh/nova/images03/ticon_2512_elnino.jpg) | Tracking El Niño Scientists struggle to understand the El Niño phenomenon, second only to the seasons in its effect on global weather. |
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![Volcano Above the Clouds](/wgbh/nova/images03/ticon_3017_kilimanj.jpg) | Volcano Above the Clouds Join a scientific expedition to the glacier-capped summit of Kilimanjaro, Africa's tallest mountain. |
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![Volcano's Deadly Warning](/wgbh/nova/images03/ticon_2913_volcano.jpg) | Volcano's Deadly Warning A man obsessed with understanding volcanoes comes up with a radical new way to predict eruptions. |
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![Volcano Under the City](/wgbh/nova/images03/ticon_3215_volcanoc.jpg) | Volcano Under the City A restless mountain threatens a bustling metropolis perched on its flanks. |
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![Warnings from the Ice](/wgbh/nova/images03/ticon_2508_warnings.jpg) | Warnings from the Ice What does it mean that over the past half century, the coastal ice on the Antarctic Peninsula has been gradually disappearing? |
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![Wave That Shook the World](/wgbh/nova/images03/ticon_3208_tsunami.jpg) | Wave That Shook the World Experts reconstruct the 2004 Indian Ocean tsunami in an effort to prepare for the next big one. |
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![What's Up with the Weather?](/wgbh/nova/images03/ticon_27gw_warming.jpg) | What's Up with the Weather? FRONTLINE and NOVA take on a complex and critical phenomenon—global warming. |
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