Nova

In 1944, a smoking, battle-scarred B-24 Liberator bomber known as the Tulsamerican crashed into the choppy seas off the coast of Croatia, entombing three of its occupants under 135 feet of water. For years they were lost to the world — and their families. But in 2010, nearly seventy years after the crash, divers located the plane. And in 2017, the Department of Defense, aided by the Croatian Navy and some of the world's leading underwater archaeologists, set to work investigating the wreckage. Were the B-24s truly as dangerous as the nickname "the Flying Coffin" suggested?

Almost a century ago, paleontologists found the first tantalizing hints of a monster even bigger than Tyrannosaurus Rex, perhaps the largest predator ever to walk the Earth: spectacular fossil bones from a dinosaur dubbed Spinosaurus. But the fossils were completely destroyed during a World War II Allied bombing raid, leaving only drawings, lots of questions, and a mystery: What was Spinosaurus? Now, the discovery of new bones in a Moroccan cliff face is reopening the investigation into this epic beast. What did it feed on and how? Why did it grow so big?

Investigate how an asteroid vanquished the dinosaurs 66 million years ago. Join scientists as they drill into the impact crater and, for the first time, reconstruct the hell on earth that unfolded in the minutes, hours and months after the impact.

Sixty-six million years ago, an asteroid wiped out the dinosaurs in a fiery global catastrophe. An amazing new trove of fossils reveals how mammals took over, ultimately evolving into the huge array of species, including us, that rule Earth today.

In recent years, an unusual spate of deadly shark attacks has gripped Australia, resulting in five deaths in 10 months. At the same time, great white sharks have begun appearing in growing numbers off the beaches of Cape Cod, Massachusetts, not far from the waters where Steven Spielberg filmed the ultimate shark fright film, Jaws. What's behind the mysterious arrival of this apex predator in an area where they've rarely been seen for hundreds of years? Are deadly encounters with tourists inevitable?

Dive under the ice to explore Antarctica's under-ice landscape with a team of scientists as they search for the mystery killer that's decimating the population of delicate shrimp-like creatures at the foundation of the Antarctic food chain.

The Duomo in Florence is a towering masterpiece of Renaissance ingenuity and an enduring source of mystery. A team of U.S. master bricklayers help build a unique experimental "mini-Duomo" using period tools and techniques. Will it stay intact during the final precarious stages of closing over the top of the dome?

Join astrophysicist and novelist Janna Levin on a mind-blowing voyage to the frontiers of black hole science, which is shining new light on the most powerful and mysterious objects in the universe.

Who built Stonehenge and why? Discover how the last decade of groundbreaking archaeological digs has revealed major new clues to Britain's enigmatic 5,000-year-old site and the people who constructed it.

A 3,700-year-old inscribed clay tablet reveals a surprising new version of the Biblical flood story, complete with how-to instructions for assembling an ark. Following the directions, expert boat builders assemble and launch a massive reed boat.

Of all the continents on Earth, none preserves a more spectacular story of its origins than Australia. NOVA's mini-series takes viewers on a rollicking adventure from the birth of the Earth to the emergence of the world we know today. With help from high-energy host and scientist Richard Smith, we meet titanic dinosaurs and giant kangaroos, sea monsters and prehistoric crustaceans, disappearing mountains and deadly asteroids. This is the untold story of the Land Down Under, the one island continent that has got it all.