When photographer Sally Eagle filmed a jaguar stalking a caiman in the Panantal of Brazil, she became a witness to nature in its purest form. Her award-winning video from the Nature's Best Photography competition captures an apex predator in the moment of a lifetime.

Jaguar vs. Caiman (2:17)

The team at the Ol Pejeta Conservancy needs to transport Kinani, a blind male elephant, to a 4,000-acre compound where he'll be able to roam freely without disturbing other wildlife. Weighing in at nearly eight tons, it'll take careful maneuvering and custom equipment to bring the animal to his new sanctuary.

Transporting a Live Elephant Is Exactly as Difficult as You Would Imagine (5:14)

When glass frogs emerge during the rainy season, researchers at the Smithsonian Tropical Research Institute follow their migration out of the forest and along streams. These transparent leaf-lying frogs are mysterious to experts who are only now starting to track their mating rituals and behavior.

Fascinating: How Transparent Glass Frogs Mate and Raise Their Young (4:27)

Billionaire Elon Musk has donated money to the Mars Society in Utah. Its purpose is to help scientists prepare for the incredibly hostile conditions on the Red Planet.

Inside Look at the Mars Simulation Project in Utah (2:42)

Contrary to popular opinion, the chances of survival in gladiatorial games were higher than originally thought. In fact, only 1 in 9 fights ended in death.

Gladiators Didn't Die As Often As You Think (1:22)

The John Cooper Works edition is the fastest machine MINI has ever built. With a 228 two-liter twin turbo motor, it can hit 0 to 60 in six seconds flat with a top speed of 152 mph.

This Is How MINI JCW Turbo Engines Are Built (2:17)

Billionaire Richard Branson has set up Virgin Galactic as part of his dream to conquer the final frontier. But it's also a bet that could land him at the forefront of a new business: space tourism.

Richard Branson Speaks on Plan for Space Tourism (2:45)

The John Cooper Works edition is the fastest machine MINI has ever built. With a 228 two-liter twin turbo motor, it can hit 0 to 60 in six seconds flat with a top speed of 152 mph.

This Is How MINI JCW Turbo Engines Are Built (2:17)

For over half a century, the Porsche 911 has been the poster child for high-performance sports cars. And with the recent addition of a turbo-charged engine, that dominance is set to continue.

Here's How a Turbo-Charged Porsche 911 Engine is Built (2:42)

Despite its dry desert landscapes, Utah is a land of surprises, and Glen Canyon is one of them, rivaling Arizona's Grand Canyon for sheer majesty.

Utah's Otherworldly Landscapes (2:20)

For 18 months, the cast and crew of the Lord of the Rings trilogy filmed their scenes across the tiny island of New Zealand. In all, over 70 sites were chosen to create writer J. R. R. Tolkien's vision of Middle-earth.

No Wonder Lord of the Rings' Middle-Earth Was Filmed Here (1:01)

Bekoji, a small town in the Ethiopian highlands, has produced five Olympic champions in the past ten years. For the hundreds of children sent there to train, the unlikely chance of victory is their only way out of poverty.

The Town That Breeds Olympic Runners (3:10)

When France sent ambassador Jean-Marie Bayol to Dahomey to secure a deal for the kingdom's rich natural resources, he was greeted by an elite force of all-women warriors known as the Agooji. Their ferocity set the tone for negotiations.

This African Warrior Ceremony Was Highly Intimidating (3:17)

Aisholpan Nurgaiv is a Kazakh girl trained by her father from childhood to be an eagle huntress and is the star of the award-winning documentary "The Eagle Huntress." Her bravery and accomplishments have inspired many.

Meet the Nomad Girl Who Hunts With a Golden Eagle (1:02)

Scythian women adorned themselves with tattoos portraying the animals they hunted. It was believed that these tattoos offered magical protection, and also used to commemorate acts of bravery.

The Significance Behind Ancient Scythian Tattoos (1:38)

Contrary to popular opinion, the chances of survival in gladiatorial games were higher than originally thought. In fact, only 1 in 9 fights ended in death.

Gladiators Didn't Die As Often As You Think (1:22)

When France sent ambassador Jean-Marie Bayol to Dahomey to secure a deal for the kingdom's rich natural resources, he was greeted by an elite force of all-women warriors known as the Agooji. Their ferocity set the tone for negotiations.

This African Warrior Ceremony Was Highly Intimidating (3:17)

In 2nd century AD, Celtic warrior Ardala is taken to Rome and tossed in a dark dungeon while her captors decide what to do with her. Little does she know that she'll have to fight if she wants to survive.

This Female Gladiator Captive Had to Fight for Her Life (2:39)

Billionaire Richard Branson has set up Virgin Galactic as part of his dream to conquer the final frontier. But it's also a bet that could land him at the forefront of a new business: space tourism.

Richard Branson Speaks on Plan for Space Tourism (2:45)

Billionaire Elon Musk has donated money to the Mars Society in Utah. Its purpose is to help scientists prepare for the incredibly hostile conditions on the Red Planet.

Inside Look at the Mars Simulation Project in Utah (2:42)

Native Montanan Casey Anderson has stumbled across a family of mountain lions living in a nearby cave. He sets up cameras to get a closer look at their lives.

Cameras Catch Adorable Glimpse of Mountain Lion Family (3:32)

Gasp! The answer will amaze you.

Ask Smithsonian: How Long Can a Person Hold Their Breath? (1:32)

Mans best friend is also one of his oldest.

Ask Smithsonian: When Did People Start Keeping Pets? (1:05)

Our host, Eric Schulze, explains how science is tackling this puzzling question from space.

Ask Smithsonian: Can Animals Predict Earthquakes and Other Natural Disasters? (1:27)

Malala Yousafzai's Message To Marley (0:32)

Lin-Manuel Miranda's Shout Out to Dave Malloy and Rachel Chavkin (3:38)

What Makes John Legend America's Most Versatile Artist (1:26)

Mick Ebeling speaks at Smithsonian magazine's 2015 Future Is Here Festival

Communicating With Brain Signals (12:06)

Matthew Burtner speaks at Smithsonian magazine's 2015 Future Is Here Festival

Ice Cycle (10:08)

Mike Jochum speaks at Smithsonian magazine's Future Is Here Festival

Microalgae: Food Fertilizer and Fuel of the Future (20:11)