A dramatic fossil could provide the final piece of the puzzle to prove that T. rex was not alone in the Late Cretaceous.

This episode explores a unique dig site in America to investigate how the T-Rex became the king of the dinosaurs.

Air Crash Investigation 4 investigates legendary aviation disasters to find out what went wrong and why.

How did the Tasmanian Tiger become extinct? This episode explores a unique dig site in Australia that could help solve the mystery.

Air Crash Investigation 4 investigates legendary aviation disasters to find out what went wrong and why.

When Ethiopian Airlines Flight 302 crashes shortly after takeoff, the catastrophe leads to the grounding of the entire Boeing 737 MAX 8 fleet.

Air Crash Investigation 4 investigates legendary aviation disasters to find out what went wrong and why.

A Pakistani airliner crashes in the Himalayas. And when their most vital piece of evidence fails to deliver, investigators scramble to find answers.

In this episode we learn the science behind attempting a snowmobile ridge jump, cycling over a pump track, and lighting fires.

In this episode we learn the science behind attempting a snowmobile ridge jump, cycling over a pump track, and lighting fires.

Customs find crystal meth in the luggage of a passenger from Ghana and a pigeon delays an Emirates flight at Manchester.

The pressure is on as engines, cargo and construction materials all go missing - pushing an airport already near-capacity to breaking point.

Over a million passengers pass through Dubai International Airport every week. Meet the people behind the scenes making this multi-billion dollar airport run smoothly.

With access to daring expeditions, precision data and classified information, we drain the ocean and reveal the secrets of the nuclear-armed Cold War.

The highest mountains on Earth are home to snow leopards, golden eagles and mountain goats. But only the toughest can endure the extreme weather, scarce food supplies and limited oxygen.

Delve beneath the surface of the largest habitat on Earth - our oceans - to uncover a world of extraordinary extremes.

Grasslands are some of the most volatile lands on the planet. We reveal the extraordinary challenges animals must overcome, and how our changing world is making survival even tougher than before.

Plenty of water, warmth and light provide perfect conditions for life to thrive and make the jungles the most diverse lands on Earth. But make no mistake, this is no Eden.

Polar species have evolved bodies and behaviours that help them combat the intense hostility of their habitats.

Flying just a few hundred feet above the desert, six single-engine WW2 fighter planes get into position for the highlight event of the Reno Air Races, with 30,000 spectators watching from below.

Garuda Indonesia Flight 421 flies straight into the eye of a massive storm. The Boeing 737 is rocked with turbulence so violent the pilots nearly lose control of their plane.

In May 2013, a BA jet made an emergency landing at Heathrow. Five years prior, the engines on a BA plane failed just before touchdown. Did experts find out why?

Discover how to make Egg McMuffins; find out what it takes to farm and shuck oysters; and visit the home of America's top-selling kosher wine.

Visit Sunkist's squeaky-clean lemon headquarters in California, and making freeze-dried astronaut food is a serious business.

We learn the secrets to bacon-flavoured soda at a Texas smokehouse and visit the farm where crispy bacon bits are smothered in rich chocolate.

Leave it to five brothers from Vietnam to perfect flaky French pastries, and watch for flying fish while ordering crab cakes in Seattle.

The highest mountains on Earth are home to snow leopards, golden eagles and mountain goats. But only the toughest can endure the extreme weather, scarce food supplies and limited oxygen.

Delve beneath the surface of the largest habitat on Earth - our oceans - to uncover a world of extraordinary extremes.

Grasslands are some of the most volatile lands on the planet. We reveal the extraordinary challenges animals must overcome, and how our changing world is making survival even tougher than before.

Plenty of water, warmth and light provide perfect conditions for life to thrive and make the jungles the most diverse lands on Earth. But make no mistake, this is no Eden.

The planet's hottest habitats - our deserts - are getting even hotter, drier and bigger, yet a host of remarkable animals still survive in the harshest conditions.

Polar species have evolved bodies and behaviours that help them combat the intense hostility of their habitats.

The highest mountains on Earth are home to snow leopards, golden eagles and mountain goats. But only the toughest can endure the extreme weather, scarce food supplies and limited oxygen.

Delve beneath the surface of the largest habitat on Earth - our oceans - to uncover a world of extraordinary extremes.

Grasslands are some of the most volatile lands on the planet. We reveal the extraordinary challenges animals must overcome, and how our changing world is making survival even tougher than before.

With access to daring expeditions, precision data and classified information, we drain the ocean and reveal the secrets of the nuclear-armed Cold War.

Using the latest sonar technology, a hi-tech expedition maps Bikini Atoll in the Pacific Ocean to reveal the world's only nuclear battlefield.