Malaysia Airlines Flight 370 goes missing, resulting in the longest, most costly search in aviation history.

Draining the Nile reveals lost secrets of the ancient Egyptian world.

Draining the ocean reveals the Gulf of Mexico's most deadly secrets.

The Ring of Fire is an area in the Pacific Ocean where volcanoes, earthquakes and tsunamis form; the ocean is drained to reveal the geological forces behind natural disasters and to uncover threats along the coast of Seattle, Tokyo and New Zealand.

The China seas are the most fiercely contested and mysterious waters on the planet.

The hidden secrets of the Nazis are revealed when the oceans covering them are drained using CGI animation.

The sea floor is the world's biggest tsunami machine, and its dangers have remained hidden from view -- until now.

In maritime warfare, saboteurs are a silent and unseen enemy.

Stories of clandestine missions conducted beneath the waves have remained hidden from prying eyes for decades, until now.

Pirates, gangsters and other villains have been swallowed up by the sea; cutting-edge technology reveals the secrets of the sea floor and exposes the shaky ground on which humans live.

Exploring evidence of underwater cities, which may be ancient archaeological sites or accidents of geology.

Draining the oceans reveals wrecks awaiting treasure hunters.

The story of how Rome dominated the world for 500 years by conquering the sea.

The plug is pulled on Scotland's famous lake to solve one of the world's greatest mysteries -- the identity of the Loch Ness monster.

How Japan dominated the Pacific during World War II, crushing the Allies.

A high-tech expedition searches for the iconic wrecks of the Battle of the Pacific, including the USS Lexington and the USS Indianapolis; funded by Microsoft co-founder Paul Allen, the expedition explains some of the greatest WWII mysteries.

The hidden secrets of World War I's most powerful weapons are revealed by draining the North Sea.

Using computer-generated imagery, the Cold War's lost nuclear weapons are revealed on ocean floors, along with evidence of secret nuclear confrontations.

Maritime archaeologists and historians go in search of the biggest wrecks ever sunk beneath the seas; new scientific data combines with cutting-edge computer graphics to drain the oceans to investigate the world's most awe-inspiring wrecks.

Maritime archaeologists and historians search for the lost wrecks of the American Civil War.

A new 3D survey of the Thai cave in Tham Luang reveals how 12 boys were rescued after being trapped.

From the award-winning team of filmmaker Darren Aronofsky ("Black Swan") and producer Jane Root ("America the Story of Us"), this 10-part cinematic event series explores the fragility and wonder of planet Earth -- one of the most peculiar, unique places in the universe. Host Will Smith guides viewers on an unprecedented exploration, bolstered by an elite group of eight astronauts who provide unique perspectives and relate personal memoirs of the planet seen from a distance. Hourlong episodes delve into monumental events such as genesis, cosmic violence, human intelligence and alien life, oxygen, and survival vs. destruction.

A follow-up to the 2001 award-winning show "The Blue Planet," this natural history series sees Sir David Attenborough return as narrator and host. A breathtaking exploration of the world's vast oceans, hourlong episodes capture animals and other living organisms in their natural habitat, presenting viewers with a fascinating insight into what life is like underwater. From tropical seas to the harsh conditions of the Arctic, the makers of "Blue Planet II" use modern filming equipment and techniques to shine a light on areas of the planet that humans have never seen before.

Oscar winners Ron Howard and Brian Grazer put their storytelling acumen to work as executive producers of "Breakthrough," a series of hourlong documentaries highlighting the stories, people, and technology behind the world's most cutting-edge scientific innovations. After considering more than 100 scientific topics for the series, the pair -- helped by National Geographic archives and research, along with the scientific resources of partner GE -- selected biotechnology, neuroscience, anti-aging technology, alternative energy, water conservation, and global pandemics. Each episode is directed by a prominent Hollywood star -- Howard himself helms "The Age of Aging," joining actors Angela Bassett ("Water Apocalypse") and Paul Giamatti ("More Than Human"), directors Peter Berg ("Fighting Pandemics") and Brett Ratner ("Decoding the Brain"), and screenwriter Akiva Goldsman ("Energy From the Edge").

Actor Kal Penn is producer/host of a series that attempts to explain how things like money, sex, food, sports and crime influence daily lives. The consequences are shown by analyzing data maps, and episodes investigate different themes through data mapping, creative visualization of information and in-depth personal stories involving fascinating characters. As well, documentary vignettes tell stories that personalize the number crunching, introducing real people who live and work at key intersections of each theme being explored. Penn serves as guide, making the information relatable to viewers.

How did we get here? How did humankind evolve from apes swinging in trees to astronauts walking on the moon? National Geographic's eight-part time-travel adventure series delves deep into history to highlight pivotal "origin" moments that fundamentally and irrevocably created modern living. Host Jason Silva ("Brain Games") guides viewers through a dazzling audio-visual portal to explore these events, such as the discoveries and applications of fire, medicine, money and transportation, while experts across each field inject commentary. The series also incorporates scripted storytelling and documentary sequences.

"Naked Science" strips away the layers of a scientific investigation into one of the big mysteries of our time, revealing through expert analysis realistic scenarios that either confirm or deny long-held assumptions and misconceptions.

China is a land full of extreme contrasts with its great blending of skyscrapers and ancient civilizations. The steep river valleys and harsh desert landscapes provide an epic cross-country journey that spans nearly 5,000 years of history. Soar over the valleys and other natural wonders like Mount Everest and man-made wonders like the Great Wall of China. With incredible aerial views and stories from those on the ground, take a step into exploring the landscapes of China.

Adventurer/survivalist Bear Grylls hosts and narrates this six-part docuseries, which draws attention to the volatility of Mother Nature and the resilient animals that survive Earth's most extreme habitats. Each hourlong episode characterizes one of the planet's roughest environments -- including jungles, mountains, deserts, oceans, the poles and grasslands -- and how each of its inhabitants acclimate to its turn of events. As Grylls guides viewers through these extreme locations, the incredible ways in which animals have adapted to survive against all odds are celebrated. As well, underscored is a sense of urgency to the effects of climate change.

Sir David Attenborough narrates this critically acclaimed series that dives deep into the marine environment of Planet Earth. Although two-thirds of the world's surface is covered with water, scientists know less about the oceans than they do about the surface of the moon. This limited series travels from various coasts to the poles to examine watery denizens ranging from the gigantic blue whale to microscopic coral polyps.