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)

Famed fisherman and adventurer Andy Coetzee thinks he may have snared a giant barracuda. He hasn't, but he's caught another interesting and prized fish--the West African Tarpon.

An Intense Struggle to Catch a Giant West African Tarpon (3:10)

Tiger cub Kumal is entirely dependent on his mother to hunt prey. He also relies on his father for protection against intruders. Someday he will need to provide for himself, but for now, the support of his parents will do.

Mother Tiger Makes Speedy Kill to Feed Cubs (2:02)

In Zambia, the 'Smoke That Thunders' is the name given to a gaping ravine filled with a stunning waterfall. We know it better as Victoria Falls, considered one of the seven natural wonders of the world.

Stunning Aerial Footage of Victoria Falls (1:23)

While it's hard to imagine Seattle's Space Needle looking any other way, few people know that the iconic 'flying saucer' design wasn't the original choice.

Space Needle Was Designed to Look Very Different (2:16)

Chicago, home to some of the tallest skyscrapers in the world, throws some pretty unusual challenges at its daring window cleaners. From heavy winds and rough weather, to falcons nesting in the tower's facade.

Window Cleaning One of Chicago's Tallest Buildings (2:32)

One of the most important byproducts of the Hoover Dam is an artificial body of water known as Lake Mead. Its presence has helped the population of Clark County grow sevenfold since 1970.

Why Las Vegas's Landscape Is So Lush and Green (2:43)

In Zambia, the 'Smoke That Thunders' is the name given to a gaping ravine filled with a stunning waterfall. We know it better as Victoria Falls, considered one of the seven natural wonders of the world.

Stunning Aerial Footage of Victoria Falls (1:23)

While Seattle is surrounded by dramatic peaks on all sides, the relatively small Mount Si sticks out as a key location in the iconic TV series, Twin Peaks, which was filmed in the area.

Here's Why Mount Si Stands Out in TV History (2:26)

The Namibian town of Swakopmund is a top tourist draw for desert lovers. Popular activities include quad-biking and sandboarding down its massive, steep dunes.

Yes, You Can Go Sandboarding in the Namib Desert (1:21)

While Seattle is surrounded by dramatic peaks on all sides, the relatively small Mount Si sticks out as a key location in the iconic TV series, Twin Peaks, which was filmed in the area.

Here's Why Mount Si Stands Out in TV History (2:26)

While it's hard to imagine Seattle's Space Needle looking any other way, few people know that the iconic 'flying saucer' design wasn't the original choice.

Space Needle Was Designed to Look Very Different (2:16)

Chicago has always been a hotbed of musical talent: whether it be Muddy Waters who moved there in 1943, or Kanye West who spent his childhood years in the Windy City.

Which Famous Music Icons Lived in These Chicago Homes? (1:34)

William the Conqueror's coronation was marred by a bizarre incident. The guards outside the cathedral mistook the cheers for a riot--so they immediately set fire to the surrounding buildings.

Why a Fire Broke Out at William the Conqueror's Coronation (2:38)

The 1066 battle of Stamford Bridge between Viking warlord Harald Hardrada and King Harold of England was said to be so violent that a giant mountain of bones remained a half century later.

The Violent 1066 Battle of Stamford Bridge (1:51)

It's 1066 and William of Normandy and his massive army of 14,000 men are preparing to cross the English Channel and invade England. But bad weather conditions force them to wait.

How Bad Weather Delayed the Norman Invasion of England (3:10)

Famed fisherman and adventurer Andy Coetzee thinks he may have snared a giant barracuda. He hasn't, but he's caught another interesting and prized fish--the West African Tarpon.

An Intense Struggle to Catch a Giant West African Tarpon (3:10)

Tiger cub Kumal is entirely dependent on his mother to hunt prey. He also relies on his father for protection against intruders. Someday he will need to provide for himself, but for now, the support of his parents will do.

Mother Tiger Makes Speedy Kill to Feed Cubs (2:02)

Rising sea levels are threatening to flood Miami. In fact, some scientists estimate that the entire city could be underwater by the end of the 21st century.

The Biggest Threat Facing the City of Miami (2:19)

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)