The author returns to Turkey to explore Derinkuyu, an ancient underground city and survival bunker that could shelter thousands in times of crisis.
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Graham visits Gunung Padang, an Indonesian archeological site, to find proof of a lost civilization — and the potential cataclysm that wiped it out.
2022 • Environment
In Cholula, Mexico's oldest continuously-inhabited city, the journalist inspects the world's largest pyramid for signs of a forgotten past.
2022 • Environment
Graham discovers a fascinating pattern that may connect the spectacular megalithic temples of Malta, which he believes to be much older than reported.
2022 • Environment
Few scholars have investigated the Bimini rock formation off the coast of Miami, once fabled to be the road to Atlantis — but Graham dives right in.
2022 • Environment
At Göbekli Tepe, the oldest known megalith in the world, Graham questions if simple hunter-gatherers alone could have built such an advanced structure.
2022 • Environment
Graham visits ancient mounds in North America and wonders if they contain astronomical significance — or even warnings of an apocalyptic climate event.
2022 • Environment
The author returns to Turkey to explore Derinkuyu, an ancient underground city and survival bunker that could shelter thousands in times of crisis.
2022 • Environment
In the ancient geological sites of North America, Graham envisions an apocalyptic event that may have changed the Earth
2022 • Environment
How the cruise of a lifetime turned into a deadly nightmare. Passengers and day trippers were trapped when New Zealand’s most active volcano erupted. Were tourists warned of the danger and could more have been done to prevent tragedy?
Four Corners • 2020 • Environment
In a Horizon special, naturalist Sir David Attenborough investigates whether the world is heading for a population crisis.
Horizon • 2009 • Environment
Six months after the explosions at the Fukushima nuclear plant and the release of radiation there, Professor Jim Al-Khalili sets out to discover whether nuclear power is safe. He begins in Japan, where he meets some of the tens of thousands of people who have been evacuated from the exclusion zone. He travels to an abandoned village just outside the zone to witness a nuclear clean-up operation.
How has a small place in northern Finland managed to become Europe's most eco-friendly town? Ii has slashed its CO2 emissions by 80% and is producing 10 times more renewable energy than it consumes. This community project could be an inspiration for us all - but such rapid change is not without opposition.
Our World • 2019 • Environment
See how Tokyo is looking for new ways to fight back against rising waters. Typhoons, tsunamis, earthquakes and sinking neighborhoods threaten one of the world’s most populous cities, and the economic engine of Japan, with some of the world’s largest problems.
S1E2 • Sinking Cities • 2018 • Environment
A look at scientists' claims about human contribution to global warming, and how statistician Leonard Tippet's investigation into snapping cotton threads helps predict extreme weather.
S1E2 • Climate Change by the Numbers • 2016 • Environment