In Cholula, Mexico's oldest continuously-inhabited city, the journalist inspects the world's largest pyramid for signs of a forgotten past.
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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
When a gamma ray burst from two colliding stars hits the atmosphere, the deadly radiation delivers agonizing death and immediately wipes out half the planet. How will the last remaining humans survive?
S1E7 • Doomsday: 10 Ways the World Will End • 2016 • Environment
Dr Helen Czerski delves into the Horizon archive to chart the transformation of a little-known theory into one of the greatest scientific undertakings in history.
Craig Reucassel tackles one of our planet's biggest challenges: climate change, exploring where our energy comes from, health effects of transport and travel emissions plus the carbon footprint of what we eat.
S1E1 • Fight For Planet A: Our Climate Challenge • 2020 • Environment
Human Planet tells remarkable stories of people who make their homes in the Arctic.
S1E3 • Human Planet • Environment
From space, Earth is a kaleidoscope. Turquoise plankton blooms trigger a feeding frenzy, China turns yellow with rapeseed flowers, and mysterious green lights appear in the ocean.
S1E3 • Earth from Space • 2019 • Environment
It's amazing to think that in the 1900s a mere tenth of the world's population lived and worked in cities. Now it is over half. With soaring populations, how will we keep our cities live-able? And what will the city of tomorrow look like?
4/10 • Catalyst: Season 1 • 2015 • Environment