What can new technology reveal about the ancient Dead Sea Scrolls? Join scientists as they investigate suspicious, newly surfaced fragments to see if they're forfeited, and use imaging techniques to digitally unravel the charred remains of a scroll.

How was Leonardo da Vinci able to think so far "outside the box" that he envisaged developments in engineering, astronomy, and anatomy that were only realized centuries later? The list of da Vinci's "firsts" is astonishing: he asserted that "the sun does not move" more than a generation before Copernicus; he reasoned that fatty deposits in narrowed arteries were caused by an unhealthy diet; he drew the first designs for a parachute, armored car, machine gun, diving suit, helicopter, and a flying machine that anticipates the modern hang glider, not to mention history's first humanoid robot. NOVA joins Walter Isaacson, author of the acclaimed recent biography, on a journey to Italy to explore the impact of da Vinci's art on his science and his science on his art.

How was Leonardo da Vinci able to think so far "outside the box" that he envisaged developments in engineering, astronomy, and anatomy that were only realized centuries later? The list of da Vinci's "firsts" is astonishing: he asserted that "the sun does not move" more than a generation before Copernicus; he reasoned that fatty deposits in narrowed arteries were caused by an unhealthy diet; he drew the first designs for a parachute, armored car, machine gun, diving suit, helicopter, and a flying machine that anticipates the modern hang glider, not to mention history's first humanoid robot. NOVA joins Walter Isaacson, author of the acclaimed recent biography, on a journey to Italy to explore the impact of da Vinci's art on his science and his science on his art.

Despite the constant news of violence, Steven Pinker believes we're living in the most peaceful period in human history. Journey through history and the human mind to explore why violence has diminished - and how we might create a more peaceful world.

Despite the constant news of violence, Steven Pinker believes we're living in the most peaceful period in human history. Journey through history and the human mind to explore why violence has diminished - and how we might create a more peaceful world.

Despite the constant news of violence, Steven Pinker believes we're living in the most peaceful period in human history. Journey through history and the human mind to explore why violence has diminished - and how we might create a more peaceful world.

Despite the constant news of violence, Steven Pinker believes we're living in the most peaceful period in human history. Journey through history and the human mind to explore why violence has diminished - and how we might create a more peaceful world.

Camera traps and drones are revolutionizing the study of wildlife by providing an up-close look at animals without disturbing them. See how these technologies are helping us understand everything from mysterious whale behavior to tiger migration.

Camera traps and drones are revolutionizing the study of wildlife by providing an up-close look at animals without disturbing them. See how these technologies are helping us understand everything from mysterious whale behavior to tiger migration.

Weighing 54,000 gross tons and stretching over two football fields, the Seven Seas Explorer is no ordinary boat. Join pioneering shipbuilders as they endeavor to build the ultimate cruise ship.

Weighing 54,000 gross tons and stretching over two football fields, the Seven Seas Explorer is no ordinary boat. Join pioneering shipbuilders as they endeavor to build the ultimate cruise ship.

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 reopens the investigation.

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 reopens the investigation.

Scientists track dolphins in the Caribbean and elephants on the African savannah, trying to unlock the secrets of animal communication. (Part 3 of 3)

Despite the constant news of violence, Steven Pinker believes we're living in the most peaceful period in human history. Journey through history and the human mind to explore why violence has diminished - and how we might create a more peaceful world.

How was Leonardo da Vinci able to think so far "outside the box" that he envisaged developments in engineering, astronomy, and anatomy that were only realized centuries later? The list of da Vinci's "firsts" is astonishing: he asserted that "the sun does not move" more than a generation before Copernicus; he reasoned that fatty deposits in narrowed arteries were caused by an unhealthy diet; he drew the first designs for a parachute, armored car, machine gun, diving suit, helicopter, and a flying machine that anticipates the modern hang glider, not to mention history's first humanoid robot. NOVA joins Walter Isaacson, author of the acclaimed recent biography, on a journey to Italy to explore the impact of da Vinci's art on his science and his science on his art.

How was Leonardo da Vinci able to think so far "outside the box" that he envisaged developments in engineering, astronomy, and anatomy that were only realized centuries later? The list of da Vinci's "firsts" is astonishing: he asserted that "the sun does not move" more than a generation before Copernicus; he reasoned that fatty deposits in narrowed arteries were caused by an unhealthy diet; he drew the first designs for a parachute, armored car, machine gun, diving suit, helicopter, and a flying machine that anticipates the modern hang glider, not to mention history's first humanoid robot. NOVA joins Walter Isaacson, author of the acclaimed recent biography, on a journey to Italy to explore the impact of da Vinci's art on his science and his science on his art.

How was Leonardo da Vinci able to think so far "outside the box" that he envisaged developments in engineering, astronomy, and anatomy that were only realized centuries later? The list of da Vinci's "firsts" is astonishing: he asserted that "the sun does not move" more than a generation before Copernicus; he reasoned that fatty deposits in narrowed arteries were caused by an unhealthy diet; he drew the first designs for a parachute, armored car, machine gun, diving suit, helicopter, and a flying machine that anticipates the modern hang glider, not to mention history's first humanoid robot. NOVA joins Walter Isaacson, author of the acclaimed recent biography, on a journey to Italy to explore the impact of da Vinci's art on his science and his science on his art.