What caused Building 7 to collapse on 9/11? Dr. Leroy Hulsey from the University of Alaska Fairbanks may have the answer, following an exhausting four year engineering study.

9/11: Missing Carmen Rivera (2022)
Luis Rivera believed his wife Carmen survived the 9/11 attacks at the World Trade Center in New York. This is the story of his search for her.

9/11: Escape from the Towers (2018)
Each World Trade Center tower consisted of 110 floors. Each floor has a story. In this two-hour special, survivors from two of those floors, many speaking publicly for the first time, tell their stories. Focusing on one floor in the North Tower and one in the South, this film will provide a never-before-achieved intimacy with what it was really like to be inside the Twin Towers on 9/11.

The Man Who Wanted to Change the World (2016)
Peter Westerveld, artist and visionary, doesn’t want institutions to resolve the problems linked to earth’s problems. Growing up in Africa, he witnessed the advance of the desert and dedicated himself to finding solutions for the ongoing erosion and desertification of the land. The film follows Peter and the NGO working with him to realise his project; to build contour trenches that capture and store rain water under the surface and replenish the desert land.

Spotlight on the Highlands (1948)
It's 1948 and hydro-electric power is transforming Scotland's Grampians.

The Hobbit Enigma (2008)
The Hobbit Enigma examines one of the greatest controversies in science today: what did scientists find when they uncovered the tiny, human-like skeleton of a strange creature, known to many as the Hobbit, on the Indonesian island of Flores in 2003?

Hindenburg: Titanic of the Skies (2007)
The film explores the background and build-up to this final flight to disaster. Using dramatic reconstruction, archive footage and exclusive interviews with leading historians and engineering experts, the special delves into the political and scientific events that led up to the catastrophe.

9/11: Cleared for Chaos (2019)
On September 11, 2001, the unimaginable transpired when devastating attacks on the World Trade Center forced the shutdown of the entire U.S. airspace. Thousands of kilometres away in Gander, Newfoundland, a group of Nav Canada air traffic controllers suddenly had the lives of 33,000 people in their hands and had to think fast to find a place for them to go. Discovery uncovers how these unsung heroes managed to safely land 224 planes in four hours, without incident.

The Death and Life of Marsha P. Johnson (2017)
Describing herself as a 'street queen,' Johnson was a legendary fixture in New York City’s gay ghetto and a tireless voice for LGBT pride since the days of Stonewall, who along with fellow trans icon Sylvia Rivera, founded Street Transvestites Action Revolutionaries (S.T.A.R.), a trans activist group based in the heart of NYC’s Greenwich Village. Her death in 1992 was declared a suicide by the NYPD, but friends never accepted that version of events. Structured as a whodunit, with activist Victoria Cruz cast as detective and audience surrogate, The Death and Life of Marsha P. Johnson celebrates the lasting political legacy of Johnson, while seeking to finally solve the mystery of her unexplained death.

Fahrenheit 9/11 (2004)
Michael Moore's view on how the Bush administration allegedly used the tragic events on 9/11 to push forward its agenda for unjust wars in Afghanistan and Iraq.

An Inconvenient Truth (2006)
A documentary on Al Gore's campaign to make the issue of global warming a recognized problem worldwide.

Cloudspotting (2010)
This 90-minute documentary brings to life Gavin Pretor-Pinney’s international bestseller, “The Cloudspotter’s Guide”, which draws on science, meteorology and mythology for a magical journey through the world of clouds. It is no dry treatise on the science of nephology but a playful trip through the varied beauty and distinctive personalities of the ten principal cloud types From the ethereal cirrus to the terrifying cumulonimbus, the film tells the story of the short but eventful life of clouds and their importance to our planet. Find out how immense quantities of water can stay up in the sky for so long and how lightning and thunder are created.

What Darwin Never Knew (2009)
Earth teems with a staggering variety of animals, including 9,000 kinds of birds, 28,000 types of fish, and more than 350,000 species of beetles. What explains this explosion of living creatures—1.4 million different species discovered so far, with perhaps another 50 million to go? The source of life's endless forms was a profound mystery until Charles Darwin brought forth his revolutionary idea of natural selection. But Darwin's radical insights raised as many questions as they answered. What actually drives evolution and turns one species into another? To what degree do different animals rely on the same genetic toolkit? And how did we evolve?

NOVA: Judgement Day - Intelligent Design on Trial (2007)
In this two-hour special, NOVA captures the turmoil that tore apart the community of Dover, Pennsylvania in one of the latest battles over teaching evolution in public schools. Featuring trial reenactments based on court transcripts and interviews with key participants, including expert scientists and Dover parents, teachers, and town officials, "Judgment Day: Intelligent Design on Trial" follows the celebrated federal case of Kitzmiller v. Dover School District.

The Gut: Our Second Brain (2014)
For a few years now, scientists have known about the existence of another brain within our bodies. This second brain, or "brain down below" is none other than our stomach. The stomach's intelligence is a new avenue of research that is fascinating research teams the world over.

Elon Musk’s Twitter Takeover (2023)
Compulsive Twitterer, Elon Musk bought himself his favorite social network in 2022, and brutally shaped it according to his desires. This punchy investigation relates the stormy relations between the platform and the billionaire, and their impact on the public debate.

Cern and the Sense of Beauty (2017)
An exploration of the link between science and beauty through the work of scientists at CERN, in Geneva.

Stem Cell Universe With Stephen Hawking (2014)
The use of embryonic stem cells has ignited fierce debate across the spiritual and political spectrum. But what if we could create manmade stem cells - or find super cells in adults that could forever replace embryonic cells and remove the controversy? Today, we are on the brink of a new era - an age where we may be able to cure our bodies of any illness. Stephen HAWKING has spent his life exploring the mysteries of the cosmos, now there is another universe that fascinates him - the one hidden inside our bodies - our own personal galaxies of cells.

Jerome Lejeune - To the Least of My Brothers and Sisters (2015)
To the Least of My Brothers and Sisters is a new documentary on the life of Jerome Lejeune, the Father of Modern Genetics that was made to celebrate the 20th anniversary of his death. Filmed on two continents, it contains numerous interviews with former colleagues, families, current medical researchers, and others, all who express the importance of Jerome Lejeune in both the history of medicine and the defense of the dignity of human life.

Uncensored Science: Bill Nye Debates Ken Ham (2014)
Bill Nye and Ken Ham debate whether creation is a viable model of origins in today's modern scientific era.

9/11: The Longest War (2016)
In honour of the 15th Anniversary of 9/11, National Geographic Channel is looking back at the very best reporting we have done since this world-changing tragedy first happened using extended excerpts from past specials that relate directly to events leading up to and following the attacks on New York City and Washington DC.