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)

On September 8th, 1974, famous daredevil Evel Knievel climbed into a steam-powered rocket and attempted to blast across Idaho's Snake River Canyon.

Evel Knievel's Famous Snake River Canyon Jump (2:35)

When the British army held Francis Scott Key captive aboard one of their warships during the Battle of Baltimore, they could never have guessed his stay would inspire their enemy's most-patriotic song.

The Battle of Fort McHenry through Francis Scott Key's Eyes (3:31)

In 1861, Mexico refused to pay back the sizable debt it owed to countries like France. It was a decision that would prompt France, under Napoleon III, to launch a full-scale invasion.

This Is Why France Invaded Mexico (4:02)

Years of wheeling and dealing collectible cars have taught Robert M. Lee that it never hurts to ask.

The $5 Million Dollar Ferrari (3:04)

This 200-ton howitzer artillery gun is too heavy to transport in one piece. The answer is to split it in two, with the barrel going on one truck and the carriage onto another. Easier said than done.

Dismantling a Huge Howitzer for a Precarious Move (3:28)

The Ocean Endeavour is sailing toward a famous glacier near the Arctic town of Ilulissat. It's a route packed with dangerous icebergs, giving the ship's sonar and radar a tough workout.

How This Ship Handles Seas Loaded With Icebergs (4:00)

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)

Washington, D.C. is named after the first U.S. president. But do you know how he chose its location?

The Reason Why DC Is Between Maryland and Virginia (3:17)

The Canadian passenger train has a unique streamlined design that goes back to the 1930s. It’s a rare aesthetic, perfectly captured by this fan who makes replicas of them to sell, all over the world.

What Makes This Canadian Train So Special? (2:09)

Dancing – and dancing shows – became a teenage craze in the 1950s, spurred by figures like Cleveland DJ, Alan Freed. His hit dance show featured R&B and African American music – which he later dubbed ‘Rock and Roll.’

This Cleveland DJ Popularized Rock 'n' Roll (2:01)

In the 1840s, Queen Victoria and Prince Albert set up elaborate white winter interiors and decorated trees to celebrate Christmas at Windsor Castle. But the photographs they released to the public told a more modest story.

Why Queen Victoria Was an Early Adopter of Photography (2:22)

On September 8th, 1974, famous daredevil Evel Knievel climbed into a steam-powered rocket and attempted to blast across Idaho's Snake River Canyon.

Evel Knievel's Famous Snake River Canyon Jump (2:35)

When the British army held Francis Scott Key captive aboard one of their warships during the Battle of Baltimore, they could never have guessed his stay would inspire their enemy's most-patriotic song.

The Battle of Fort McHenry through Francis Scott Key's Eyes (3:31)

In 1861, Mexico refused to pay back the sizable debt it owed to countries like France. It was a decision that would prompt France, under Napoleon III, to launch a full-scale invasion.

This Is Why France Invaded Mexico (4:02)

Today, bloodstain pattern analysis is routinely used in murder investigations - analysts draw on chemistry, mathematics and physics to determine the area of origin where an injury occurred.

These Are the Three Main Categories of Bloodstain Pattern (2:17)

Mantis Shrimp have a knockout punch, delivering a killer blow as fast as a 22-caliber bullet.

The Fastest Punch in the World (2:52)

In the 1860s, the Australian Outback was the scene of major railroad expansion. At the heart of it was an unusual animal helping haul people and cargo alike.

The Unlikely Animal That Built Australia's Ghan Railway (1:41)

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)

"They have given mankind a completely new way of looking at the universe." Stephen Hawking, congratulates Kip Thorne, Rainer Weiss, Barry Barish and Ronald Drever, the first scientists to detect gravitational waves, at the 2016 Smithsonian magazine American Ingenuity Awards.

Stephen Hawking Congratulates the LIGO Team on Winning the 2016 American Ingenuity Award in Physical Sciences (2:52)

Superman isnt coming. It is a moment in our time when we must look to ourselves, and not take for granted or wait for something from the top to come down, but ratherpick up the torch, carry the torch, to find information and the truth Erin Brockovich applauds Marc Edwards and LeeAnne Walters for their work exposing the Flint water crisis at the 2016 Smithsonian magazine American Ingenuity Awards.

Erin Brockovich Congratulates Marc Edwards and LeeAnne Walters on Winning the 2016 American Ingenuity Award for Social Progress (2:25)

"OK Go made music videos relevant again." Stephen Colbert | OK Go, Damian Kulash Jr. and Trish Sie won the Smithsonian magazine American Ingenuity Award for Visual Arts for pushing the music-video envelope with their zero-gravity video for "Upside Down & Inside Out."

Stephen Colbert Congratulates OK Go on Winning the 2016 American Ingenuity Award for Visual Arts (1:40)

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)