Mark Thiessen Video -- National Geographic

Mark Thiessen Video Thirty-foot- (nine-meter-) tall fire tornadoes, walls of flames and debris flying in every direction. It's all in a day's work for this wildland photographer.Welcome to the National Geographic video player.Video Sections

Environment Video - Get an in-depth look at the constantly changing Earth, from natural disasters like volcanoes and tornadoes, to global warming and other effects of climate change.

Natural Disasters >> Landslides and More - Witness the awesome power of nature through incredible footage from around the world.
- Annual Wave - Once a year, thousands come to China's Hangzhou Bay to witness an annual tidal wave.
- Droughts 101 - When the rains fail, the land—and its people—vanish in the wind.
- El Niño - Find out how simple changes in ocean currents can lead to catastrophic weather conditions.
- Floods 101 - No other kind of natural disaster in America has caused more death and destruction than floods.
- Hay Devils - Our atmosphere can spin out deadly tornadoes, but also gentle whirlwinds that provide a glimpse at the forces of nature that drive our planet.
- Landslides 101 - See the awesome destructive power of landslides.
- Lightning 101 - Lightning strikes during thunderstorms kill more Americans each year than either tornadoes or hurricanes.
- Mark Thiessen - Thirty-foot- (nine-meter-) tall fire tornadoes, walls of flames and debris flying in every direction. It's all in a day's work for this wildland photographer.
- Po River - The Po River, Italy's bread basket, is a great resource, but it is also proving to be a great force of nature which must be reckoned with.
- Rookie Smokejumpers - They are considered an elite strike force that can get to a fire quickly, before it gets out of control.
- Storm Surge - Join a film crew as they battle crashing waves on a shoreline during a storm.
- Weather - Discover the hidden forces behind tomorrow's weather.
- Wildfire Research - When the firefighters are gone and the fire has been extinguished, it's up to the BAER team to make sure that the damage done has no further repercussions.
Energy - Learn about new sources for energy and see how they work.
Environmental Threats - Get a first-hand look at the greatest dangers facing the environment.
Global Warming - See the effects global warming is having on polar bears, arctic ice, glaciers, and more, and learn about how CO2 and other greenhouse gases are contributing to climate change.
Going Green - Get tips on how you can help keep the environment healthy.
Green Guide - A myriad of ways to reduce your carbon footprint.
Habitats - Explore the world's most thrilling landscapes in breathtaking video.
Natural Disasters - Witness the awesome power of nature through incredible footage of tsunamis, earthquakes, tornadoes, volcanoes, and more.
Ocean Now - National Geographic's Ocean Now is a project to study the last healthy, undisturbed places in the ocean. Follow Dr. Enric Sala and a team of scientists as they explore the pristine waters of the southern Line Islands.
Preserve Our Planet - preserve our planet
State of the Earth - See exactly what's going on in the envriornment around the world, and get a sense of what's working and where we can make major improvements.
Threats to Animals - Take a closer look at the biggest challenges faced by other members of the animal kingdom in today's changing environment.

Animals Video - All the beauty and excitement of the animal kingdom comes to you in thrilling footage of lions, sharks, squid and more.

Daily News Video - See the latest videos or breaking news from researchers and explorers in the field as they make the discoveries that shape the way we see the world.

Environment Video - Get an in-depth look at the constantly changing Earth, from natural disasters like volcanoes and tornadoes, to global warming and other effects of climate change.

Kids Video - Wild, creepy, cute, and slimy animals from puppies and lions to lizards and snakes all do thier amazing things and we catch it all on video.

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Science & Space Video - Watch a video about science, the human body, and the solar system, and see other science and space videos from National Geographic.

Specials Video - Watch thrilling trailers and clips from events like the annual National Geographic GeoBee to the release of new giant-screen films.

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