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Our World Is on FireAround the world, the impacts of global warming intensify; climate change is a climate crisis, and the world cries out for help.

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Our World Is on FireAround the world, the impacts of global warming intensify; climate change is a climate crisis, and the world cries out for help.0Tsunamis: Facing a Global ThreatA worldwide scientific investigation on tsunamis with the UN's hand-picked scientific team of tsunami hunters.

Cosmic Journeys Series

• Now Playing26minIs the Universe Infinite?
• Now Playing26minMars: World That Never Was
• Now Playing26minSaturn's Mysterious Moons
• Now Playing26minCrashing Into the Moon
• Now Playing26minHow Large is the Universe?
• Now Playing25minThe Incredible Journey of Apollo 12
• Now Playing25minThe Most Powerful Objects in the Universe
• Now Playing25minAttack of the Sun
• Now Playing26minMysteries of a Dark Universe
• Now Playing25minThe Riddle of Antimatter
• Now Playing25minBirth of the Moon
• Now Playing26minThe Largest Black Holes in the Universe
• Now Playing25minBirth of a Black Hole

Cosmic Vistas Series

• Now Playing24minNight Fire
• Now Playing24minVirtual Universe
• Now Playing24minStargazer's Paradise
• Now Playing23minHubble's Renaissance
• Now Playing24minSuperscopes
• Now Playing24minCosmic Rainbow
• Now Playing24minSeasons of Saturn
• Now Playing24minVesta Unveiled
• Now Playing24minWater Worlds
• Now Playing24minGravity
• Now Playing24minScience and the Shuttle
• Now Playing24minLanding on Mars
• Now Playing26minThe Big Bang
• Now Playing23minMilky Way
• Now Playing23minThe Hot Zone
• Now Playing23minCosmic Rays
• Now Playing23minThe Fermi Paradox
• Now Playing23minLandsat
• Now Playing27minEye of the Beholder
• Now Playing27minPainted By Light
• Now Playing27minColour
• Now Playing27minCosmic Perspective
• Now Playing27minGrand Design
• Now Playing27minVanishing Points

Disasters in Space

• Now Playing25minReturn to Disaster
• Now Playing26minMars or Bust
• Now Playing25minSpace Shuttle Shuffle
• Now Playing25minThe End of Genesis
• Now Playing26minTrains, Rockets, and Pains
• Now Playing26minColumbia

Space: The New Frontier Series

• Now Playing25minThe Cryosphere
• Now Playing25minSet Course for the Heart of the Sun
• Now Playing25minTickets Please
• Now Playing24minMercury or Bust
• Now Playing25minHyabusa 2
• Now Playing25minEyes to the Heavens
• Now Playing25minMartian Attractions
• Now Playing25minCubes
• Now Playing25minProving Einstein
• Now Playing25minWhere are all the Aliens?
• Now Playing25minStar Light Star Bright
• Now Playing25minMoon Shine
• Now Playing25minRising Tides
• Now Playing25minEarth's Evil Twin
• Now Playing25minIncreasing Orbit
• Now Playing25minMountains in the Dark
• Now Playing25minOceans in the Sky
• Now Playing25minWebb of Life
• Now Playing25minPeering Into the Abyss
• Now Playing25minNext Big Leap