Gold, the shiny precious metal that has been cherished through all recorded time, is vital to the modern world; if gold was suddenly stripped away, the technological and cultural world would be left reeling.

A dentist from Kiev hopes for an extended stay in the U.S. after fleeing war in her home country; at the Detroit Border, a case of mistaken identity causes alarm; in Chicago, a metaphysical healer wishes a CBP officer good vibes.

A dentist from Kiev hopes for an extended stay in the U.S. after fleeing war in her home country; a traveler headed to Vegas points to a friend as the source of the extra cash he's carrying.

A Canadian landscaper forgets to tell CBP about his imminent flight; a trucker's day goes sideways when he makes a wrong turn and ends up at the border; at Chicago O'Hare a traveler is irate when he's taken to secondary.

A traveler with bags full of counterfeit merchandise isn't bothered by CBP's probing questions; a woman crossing the border finds herself in a salty situation; a journalist hoping to visit the US on vacation is interviewed about his work prospects.

Cesar rehabs an overprotective Belgian Malinois and a puppy with no leadership.

A pet parent unknowingly trains his pit bull to attack cleaning objects.

Cesar rehabs a sound sensitive sheepdog and a confused golden retriever.

Cesar helps a back-of-the-pack biter and his pet parent shed their fear.

Cesar helps a pet parent whose three dogs battle to the point of bloodshed.

Cesar helps a pet parent whose three dogs battle to the point of bloodshed.

Cesar rehabs an overexcited Australian shepherd and its emotional pet parent.

Phil Breslin ventures into Australia's notorious swamp country where he encounters the speedy freshwater crocodile, the predatory barramundi and the world's largest reptile, the saltwater crocodile.

Phil encounters Australia's largest lizard, the fastest flightless bird and the world's largest marsupial in the endless heat of the Simpson Desert.

A guide to romance and reproduction, underdog-style.

Everything feels connected as the vets see patterns emerge in their cases.

The clinic braces for a snowstorm as Doc races to an emergency farm call.

Phil Breslin ventures into Australia's notorious swamp country where he encounters the speedy freshwater crocodile, the predatory barramundi and the world's largest reptile, the saltwater crocodile.

Phil encounters Australia's largest lizard, the fastest flightless bird and the world's largest marsupial in the endless heat of the Simpson Desert.

Everything feels connected as the vets see patterns emerge in their cases.

Cesar rehabs an overprotective Belgian Malinois and a puppy with no leadership.

A pet parent unknowingly trains his pit bull to attack cleaning objects.

Cesar rehabs a sound sensitive sheepdog and a confused golden retriever.

Cesar helps a back-of-the-pack biter and his pet parent shed their fear.

Two women returning from a tropical vacation are questioned; at JFK cargo facility, a bounty of gold jewelry is apprehended when the manifesto seems to sell its value short; Baily the dog has a big day.

A traveler headed to Vegas rolls the dice on getting into the US for a vacation; a family immigrating from Vietnam hope their enthusiasm translates; at JFK cargo facility, boxes of pancake mix fall flat.

A man from Mexico is questioned when it is indicated his vacation plans may include a work component; at JFK cargo facility a shipment of live moth pupas is put under the microscope; in San Francisco, an angry traveler points a finger at CBP.

A couple and their girlfriend, with a loaded weapon on board, reach the border by mistake; in San Francisco, a man wandering aimlessly around the airport after his flight arrives is questioned about the contents of his luggage.

Ken takes a roll in his bulldozer; beavers threaten Big Al's operation; Karl's loader springs a leak.

The Pickers visit Armstrong, Abbotsford and Mission in British Columbia as they compete to see who can obtain the most manly item; trolley ads, tin litho signs and rare gas pumps are among the unique finds.

Glass brought light into homes and put the world into focus; people use glass to protect ourselves, cure disease, and create artistic masterpieces.

Two women returning from a tropical vacation are questioned; at JFK cargo facility, a bounty of gold jewelry is apprehended when the manifesto seems to sell its value short; Baily the dog has a big day.

A traveler headed to Vegas rolls the dice on getting into the US for a vacation; a family immigrating from Vietnam hope their enthusiasm translates; at JFK cargo facility, boxes of pancake mix fall flat.

A man from Mexico is questioned when it is indicated his vacation plans may include a work component; at JFK cargo facility a shipment of live moth pupas is put under the microscope; in San Francisco, an angry traveler points a finger at CBP.

A couple and their girlfriend, with a loaded weapon on board, reach the border by mistake; in San Francisco, a man wandering aimlessly around the airport after his flight arrives is questioned about the contents of his luggage.

Francis Drake is cemented in history as the world's most controversial pirate.

Grace O'Malley defies gender conventions of her day and becomes the most feared and respected leader of both the land and the sea, eventually rising to Chieftain.

Englishman-turned-Algerian pirate John Ward becomes ruler of the Tunisian empire.

Brilliant strategist Morgan takes humans, treasure, and towns without mercy.

Captain Kidd, the treasure hunter, turns from pirate hunter to pirate.

Blackbeard's name strikes fear into all as a brutal diabolical pirate.

Braver than the men, Anne Bonny and Mary Read are ferocious female pirates.

Australia is home to weird and wonderful creatures that have evolved extraordinary adaptations due to being isolated from the rest of the world.

CBP and HSI track 25,000 ecstasy pills bound for Philadelphia from Germany.

Australia's coastline is a true natural wonder, encompassing bountiful habitats where mesmerizing and surprising creatures reign supreme.

Australia is home to weird and wonderful creatures that have evolved extraordinary adaptations due to being isolated from the rest of the world.

CBP and HSI track 25,000 ecstasy pills bound for Philadelphia from Germany.

Australia's coastline is a true natural wonder, encompassing bountiful habitats where mesmerizing and surprising creatures reign supreme.

Francis Drake is cemented in history as the world's most controversial pirate.

Grace O'Malley defies gender conventions of her day and becomes the most feared and respected leader of both the land and the sea, eventually rising to Chieftain.

Englishman-turned-Algerian pirate John Ward becomes ruler of the Tunisian empire.

Brilliant strategist Morgan takes humans, treasure, and towns without mercy.

A small convoy heads out with an oversized load; Lisa Kelly and Reno Ward's skills are tested by the treacherous journey; Art Burke attempts to navigate an ice road over a frozen lake; Alex Debogorski stops to help a stranded trucker.

Ken battles frigid conditions and disappointing returns; an ancient waterfall proves problematic to Cam; Karl's mechanical skills are put to the test.

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Officers get the dope on a traveler's rap sheet; A passenger is unsure of his luggage contents.

Ken battles frigid conditions and disappointing returns; an ancient waterfall proves problematic to Cam; Karl's mechanical skills are put to the test.

The clinic braces for a snowstorm as Doc races to an emergency farm call.

A muskrat attack sends a dog to the vet; Dr. Nicole has exciting news.

Spring brings a baby boom of goats, reindeer, and puppies to the clinic.

Dr. Pol and Charles cook up a special treat for Mother's Day.

A documentary-style look into the personal lives of the country vets.

Dr. Pol welcomes a new vet, Dr. Olivia, to the clinic.

A challenging farm call turns into an emergency for one of the team.

A Chihuahuas labor stalls, and a curious cat gets hooked.

A family tradition for the generations, it's time for an incredible fair.

A new addition; Doc and Diane welcome a Friesian filly to the family.

Dr. Pol and his team handle animal emergencies in Central Michigan.

A cow requires the doctor's assistance.

Dr. Pol needs to take blood samples from a flock of sheep to test for Ovine Progressive Pneumonia, a progressive, incurable and highly contagious disease.

Dr. Pol and his team handle animal emergencies in Central Michigan.

A cow requires the doctor's assistance.

Dr. Pol needs to take blood samples from a flock of sheep to test for Ovine Progressive Pneumonia, a progressive, incurable and highly contagious disease.

The clinic braces for a snowstorm as Doc races to an emergency farm call.

A muskrat attack sends a dog to the vet; Dr. Nicole has exciting news.

Spring brings a baby boom of goats, reindeer, and puppies to the clinic.

Dr. Pol and Charles cook up a special treat for Mother's Day.

Reno Ward has a disastrous encounter with a speeding pick-up truck; Lisa Kelly attempts to rescue Reno but is forced to leave him to fend for himself; Art Burke attempts to deliver a Zamboni to save an isolated community's hockey season.

Ken needs a lifeline in order to salvage his season; Cam encounters a dangerous wall of ice; Big Al's dozer breaks down.

Reno Ward has a disastrous encounter with a speeding pick-up truck; Lisa Kelly attempts to rescue Reno but is forced to leave him to fend for himself; Art Burke attempts to deliver a Zamboni to save an isolated community's hockey season.

Ken needs a lifeline in order to salvage his season; Cam encounters a dangerous wall of ice; Big Al's dozer breaks down.

Ken must make his way up Moose Creek's treacherous road in a desperate attempt to get fuel; Karl has major problems with his sluice; Big Al's stripping dozer goes down for the count.

Ben Horton travels to the Ningxia Autonomous Hui Region, located in northern China.

Photographer Ben Horton teams up with Chinese explorers for an intrepid journey to three remote locations in search of communities that are thriving in extreme environments.

Two Chinese adventurers embark on a dangerous journey exploring one of China's biggest underwater cave systems, Du'an, to discover its hidden secrets.

The discovery of a bronze-gold treasure reveals a long-lost kingdom; archaeologist Sam Willis and his team of experts use advanced laser drone technology to explore the mysterious civilization.

Experts use modern technology to examine the revered Mausoleum of the First Qin Emperor and discover what is inside.

Paul Salopek, a National Geographic explorer and Pulitzer Prize winner, navigates through the mountains of the Yunnan province in southwest China, exploring its rich biodiversity with the help of a few locals.

Paul leaves Yunnan and moves to neighboring Sichuan province with his hiking friends.

National Geographic explorer and writer Paul Salopek walks the Tea Horse Road, a southerly branch of the vast ancient silk road network in China, delving into its rich history and culture through the lens of a village historian.

National Geographic explorer and writer Paul Salopek traces the ancient Min River in Sichuan province with his local walking partners, including Chinese historian Professor Luo Xing.

Looking into the journey and the story behind the notorious Stanford Prison Experiment, as told by its prisoners and guards.

Secrets that unravel Dr. Zimbardo's official story come to light.

Archaeologists search for the truth behind the Curse of Tutankhamun.

Chef Pablo tags along thousands of devotees as they perform rituals and distribute sweets to celebrate the Ganpati Festival, which is dedicated to Lord Ganesh.

Dr. Zimbardo defends his claim to fame; an unexpected reunion takes place.

Archaeologists search for the truth behind the Curse of Tutankhamun.

Chef Pablo tags along thousands of devotees as they perform rituals and distribute sweets to celebrate the Ganpati Festival, which is dedicated to Lord Ganesh.

Dr. Zimbardo defends his claim to fame; an unexpected reunion takes place.

Ben Horton travels to the Ningxia Autonomous Hui Region, located in northern China.

Photographer Ben Horton teams up with Chinese explorers for an intrepid journey to three remote locations in search of communities that are thriving in extreme environments.

Two Chinese adventurers embark on a dangerous journey exploring one of China's biggest underwater cave systems, Du'an, to discover its hidden secrets.

The discovery of a bronze-gold treasure reveals a long-lost kingdom; archaeologist Sam Willis and his team of experts use advanced laser drone technology to explore the mysterious civilization.

Officers question a man from Texas who arrives with his hunting equipment.

A Dutch woman with a lot of luggage claims she's on a four-day holiday; a Chinese parcel contains a shocking surprise; actor Corey Feldman shows up.

An angry businessman hides the real reason for his hostility; officers try to process some unusual Mexican migrants.

Officers drill an American oil worker with a shady past; a British traveler's proposed reunion with a girlfriend could be cut short.

The fundamental creation of the wheel helps shape the human experience, but if the wheel suddenly stopped working and society lost the greatest, game-changing accomplishments made using wheel technology, the world would be vastly different.

Ken and Guillaume travel over a dangerous mountain pass; Cam worries about getting Gary into the country; Nina and Chris have a difficult start to their season.

A big bump takes out Art Burke's radiator; Todd Dewey's rig lands in a snowbank; Steph Custance regrets her foray onto a wet ice crossing; Alex Debogorski uses a sled to drag a construction shack across a frozen lake.

Officers question a man from Texas who arrives with his hunting equipment.

A Dutch woman with a lot of luggage claims she's on a four-day holiday; a Chinese parcel contains a shocking surprise; actor Corey Feldman shows up.

An angry businessman hides the real reason for his hostility; officers try to process some unusual Mexican migrants.

Officers drill an American oil worker with a shady past; a British traveler's proposed reunion with a girlfriend could be cut short.

An HSI stakeout leads to nearly $500,000 of meth and fentanyl in San Diego; CBP finds concealed cash and a carload of cocaine at the El Paso border.

PR AMO team hunts down boat loaded with $41 million of coke; CBP gets a tip about money smugglers and finds cocaine and people inside car trunks.

HSI performs an undercover drug sting; CBP finds cocaine in Rio Grande Valley.

CBP's K9 sniffs out hidden cash; HSI intercepts a $2 million drug deal.

CBP in JFK and HSI in San Diego tackle fentanyl crisis on opposite coasts.

HSI partners with Colombian National Police to dismantle illegal gold mining operations; CBP thwarts cartel activity in Texas.

HSI money laundering stings; CBP's largest drug seizure in LAX history.

HSI runs a human trafficking sting; CBP arrests a domestic terror suspect.

The Coast Guard traces smugglers' tracks and stumbles upon a remarkable discovery; a Coast Guard plane searches for a missing fishermen.

The Coastguard seizes a boat carrying over 3 tons of drugs.

HSI runs a human trafficking sting; CBP arrests a domestic terror suspect.

The Coast Guard traces smugglers' tracks and stumbles upon a remarkable discovery; a Coast Guard plane searches for a missing fishermen.

The Coastguard seizes a boat carrying over 3 tons of drugs.

An HSI stakeout leads to nearly $500,000 of meth and fentanyl in San Diego; CBP finds concealed cash and a carload of cocaine at the El Paso border.

PR AMO team hunts down boat loaded with $41 million of coke; CBP gets a tip about money smugglers and finds cocaine and people inside car trunks.

HSI performs an undercover drug sting; CBP finds cocaine in Rio Grande Valley.

CBP's K9 sniffs out hidden cash; HSI intercepts a $2 million drug deal.

A sloshed snowboarder causes trouble at the airport; a pair of packages add up to a deadly surprise.

A bad-tempered drill worker returning home from Japan goes one step too far with officers; a Californian woman hides something in her child's stroller.

A Korean bride-to-be tries to enter Canada as a tourist; the Marine Enforcement Team tackles a massive Japanese freighter carrying an illegal passenger.

Officers suspect an IT consultant has arrived for more than just a holiday; a surfer returns from Southeast Asia with a strange souvenir.

Exploring what the world would be like if salt and all of its vital contributions, from food preservation to enabling industry, were to suddenly disappear.

Cam takes a risk on a pricey water cannon; a piece breaks on Karl's sluice plant; Ken and Guillaume test for gold.

Lisa Kelly and Steph Custance team up for a challenging passage on the icy terrain; Art Burke brings a split load into the north country, hoping this will be his last load of the year; Todd Dewey hauls a double oversized camp shack.

A sloshed snowboarder causes trouble at the airport; a pair of packages add up to a deadly surprise.

A bad-tempered drill worker returning home from Japan goes one step too far with officers; a Californian woman hides something in her child's stroller.

A Korean bride-to-be tries to enter Canada as a tourist; the Marine Enforcement Team tackles a massive Japanese freighter carrying an illegal passenger.

Officers suspect an IT consultant has arrived for more than just a holiday; a surfer returns from Southeast Asia with a strange souvenir.

Mariana investigates underground fight clubs and the push to bring bare-knuckle fighting into the mainstream.

Mariana explores the global surrogacy market to understand how the dream of starting a family is fueling a babies-for-cash black market.

Mariana tracks the illicit path of hashish from Morocco into Europe; a world of shadowy dealers, fast smuggling boats and endless wealth.

Health care costs have pushed millions of Americans to the black market.

Mariana investigates the dangerous, high-stakes world of illegal gambling.

Mariana heads to the Congo to investigate the illegal trading of wild apes that have apes on the brink of extinction.

The trafficking of human remains yields billions of dollars globally and remains clandestine; Mariana's investigation reveals the vulnerability of anyone to human remains trafficking.

Mariana heads to Mexico to investigate the billion-dollar business of people-smuggling to the U.S., a system fueled by cartels and corruption.

Mariana travels to Vietnam to investigate reports that young women are being trafficked into China to be sold as unwilling brides.

Detective Bryan Johnson's first case is a homicide; to solve it, he first needs to identify the victim, so he enlists the help of the DNA Doe Project.

Mariana heads to Mexico to investigate the billion-dollar business of people-smuggling to the U.S., a system fueled by cartels and corruption.

Mariana travels to Vietnam to investigate reports that young women are being trafficked into China to be sold as unwilling brides.

Detective Bryan Johnson's first case is a homicide; to solve it, he first needs to identify the victim, so he enlists the help of the DNA Doe Project.

Mariana investigates underground fight clubs and the push to bring bare-knuckle fighting into the mainstream.

Mariana explores the global surrogacy market to understand how the dream of starting a family is fueling a babies-for-cash black market.

Mariana tracks the illicit path of hashish from Morocco into Europe; a world of shadowy dealers, fast smuggling boats and endless wealth.

Health care costs have pushed millions of Americans to the black market.

The Inland Enforcement Team track down an alleged German sex offender; a detector dog sniffs out trouble in an unclaimed suitcase from Dubai.

A Canadian wanted in Alberta is stopped en route to Ecuador; a parcel of baby food contains surprising ingredients.

A Russian dissident's complicated past raises questions for officers; a Korean tourist's resume and school diplomas raise eyebrows.

The Inland Enforcement Unit tracks a pair of Honduran drug runners; an American tourist seems to have already put down roots in Canada.

The world is literally buzzing with insects; bees, spiders and insects of all shapes and sizes touch every aspect of life, they're the essential workers that pollinate food, clean up the dead and are an integral part of the ecosystem.

Cam and his crew hurry to begin sluicing Donovan cut; Karl motivates his crew; Chris and Nika face a sluice plant breakdown.

Drivers head out one last time during the spring thaw; Steph Custance slides into trees; Todd Dewey struggles with a load on a twisty trail; Art Burke retrieves a heavy bulldozer; Reno Ward's truck dies on the ice; Lisa Kelly gets an emergency call.

The Inland Enforcement Team track down an alleged German sex offender; a detector dog sniffs out trouble in an unclaimed suitcase from Dubai.

A Canadian wanted in Alberta is stopped en route to Ecuador; a parcel of baby food contains surprising ingredients.

A Russian dissident's complicated past raises questions for officers; a Korean tourist's resume and school diplomas raise eyebrows.

The Inland Enforcement Unit tracks a pair of Honduran drug runners; an American tourist seems to have already put down roots in Canada.

Spring hits remote Alaska and the rush to adapt to change has arrived.

Alaskans must use sweat equity to harvest and preserve their bounty.

Alaskans must harness nature's resources in order to survive in the Arctic.

No matter the season, danger lurks in Alaska's backcountry.

Residents of Alaska must hunt to prepare for the harsh winter months ahead.

With winter approaching, rural Alaskans must prepare for their every need.

As the first signs of winter blanket the landscape, Alaskans must prepare.

The harsh Alaskan winter breeds ingenuity and adaptation to survive.

Tim Shaw and Fuzz Townshend undertake dramatic automobile interventions across the U.K.

The Petrel team searches for the American aircraft carrier USS Hornet; the ship's life is cut short when the Hornet sails into a hornet's nest of Japanese ships.

The harsh Alaskan winter breeds ingenuity and adaptation to survive.

Tim Shaw and Fuzz Townshend undertake dramatic automobile interventions across the U.K.

The Petrel team searches for the American aircraft carrier USS Hornet; the ship's life is cut short when the Hornet sails into a hornet's nest of Japanese ships.

Spring hits remote Alaska and the rush to adapt to change has arrived.

Alaskans must use sweat equity to harvest and preserve their bounty.

Alaskans must harness nature's resources in order to survive in the Arctic.

No matter the season, danger lurks in Alaska's backcountry.

Trouble looms for a young Asian woman carrying someone else's bag, and a pair of Canadians return from a concert in California with more than a T-shirt.

A street performer is caught in the middle of an escape act; a cheeky bus passenger answers questions about his mischievous past.

A distinctive bag has officers seeing double; a photographer misses the big picture; a heavily-modified truck causes concern.

A traveler's textbooks teach him an unexpected lesson; a tourist hits a snag instead of the slopes; officers inspect a shipment of cosmetics.

Examining the history of cats and dogs and how they have been helpful companions to humankind all over the globe.

Stressed, Chris and Nika butt heads; Cam faces machine failures and contaminated fuel; Ken and Guillaume find traces of gold.

With the biggest storm in centuries only a few days away, the truckers race for loads; Art and Todd set out to prove themselves.

Trouble looms for a young Asian woman carrying someone else's bag, and a pair of Canadians return from a concert in California with more than a T-shirt.

A street performer is caught in the middle of an escape act; a cheeky bus passenger answers questions about his mischievous past.

A distinctive bag has officers seeing double; a photographer misses the big picture; a heavily-modified truck causes concern.

A traveler's textbooks teach him an unexpected lesson; a tourist hits a snag instead of the slopes; officers inspect a shipment of cosmetics.

Dr. Pol examines a goat that has been refusing to eat.

An ice storm shuts down the clinic, and newborn labs are melting hearts.

Doctors from Pol Veterinary Services rush to help a distressed cow and her calf.

The vets tackle a twisted calving, a flock of ducks and a pack of rats.

Pets in a jam with quills, fishhooks, and string go to PVS to get unstuck.

There's no time to rest with emergency calvings, rowdy pups, and ailing felines.

A new Pol family member is born.

Phil Breslin heads along the rugged cliffs and sandy flats of the coast to find a sea eagle, an estuarine stonefish, and a stingray.

Phil Breslin ventures into Australia's notorious swamp country where he encounters the speedy freshwater crocodile, the predatory barramundi and the world's largest reptile, the saltwater crocodile.

Examine some of the most unsuspecting con artists of the animal kingdom as they showcase their skills.

A blocked bearded dragon; a feisty cow to dodge; a surprise for Tater.

A puppy tornado touches down at PVS; a cute kitten is rescued.

Phil Breslin heads along the rugged cliffs and sandy flats of the coast to find a sea eagle, an estuarine stonefish, and a stingray.

Phil Breslin ventures into Australia's notorious swamp country where he encounters the speedy freshwater crocodile, the predatory barramundi and the world's largest reptile, the saltwater crocodile.

A blocked bearded dragon; a feisty cow to dodge; a surprise for Tater.

Dr. Pol examines a goat that has been refusing to eat.

An ice storm shuts down the clinic, and newborn labs are melting hearts.

Doctors from Pol Veterinary Services rush to help a distressed cow and her calf.

The vets tackle a twisted calving, a flock of ducks and a pack of rats.

Officers add charges to a woman's lengthy rap sheet and stumble upon a hair-raising package from Malaysia.

Officers are stumped by a backpacker carrying photos of his criminal activities; an American band gets caught in a jam.

Staff confront an American soldier running scared; a British woman causes confusion with her bag of tricks.

Hidden compartments in a traveler's backpack raise red flags; the discovery of a deadly weapon leaves mail center workers stunned.

Massive and sophisticated contributions from Korea have shaped our modern world, from ancient advances like the greenhouse and armoured boats to modern screen technology, online gaming, E-sports and K-Pop.

Cam hits permafrost, forcing him to shut down the plant; Ken and Guillaume abandon Arizona Creek; Karl gambles with broken equipment.

The truckers race to deliver their loads while a massive storm approaches; Lisa and Art face a deadly shutdown; Darrell and Todd's feud threatens to rip team Polar apart.

Officers add charges to a woman's lengthy rap sheet and stumble upon a hair-raising package from Malaysia.

Officers are stumped by a backpacker carrying photos of his criminal activities; an American band gets caught in a jam.

Staff confront an American soldier running scared; a British woman causes confusion with her bag of tricks.

Hidden compartments in a traveler's backpack raise red flags; the discovery of a deadly weapon leaves mail center workers stunned.

New discoveries reveal the secrets of Roman gladiators' enduring appeal.

Archaeologists dig in Pompeii to uncover the dark side of the idyllic Roman city by finding the room of an enslaved person.

Archaeologists reveal the discovery of a Nero megastructure.

Discoveries uncover how the Romans ruled the seas for four centuries.

Archaeologists excavate a buried city in Jordan, dive a sunken temple in Italy and explore Petra to shed new light on how Rome conquered the east.

Archaeologists excavate the vast frontier of the Roman Empire, investigating the battle to keep it safe.

How the giant ice age mammoth became extinct.

Taking a look at the excavations in the La Brea Tar Pits in Los Angeles and showcasing how the pits can help unravel the mystery of how the saber-toothed tiger hunted its prey.

CBP finds 100 kilos of coke in a banana shipment bound for a Philly bodega.

How the giant megalodon shark took over the oceans.

Taking a look at the excavations in the La Brea Tar Pits in Los Angeles and showcasing how the pits can help unravel the mystery of how the saber-toothed tiger hunted its prey.

CBP finds 100 kilos of coke in a banana shipment bound for a Philly bodega.

How the giant megalodon shark took over the oceans.

New discoveries reveal the secrets of Roman gladiators' enduring appeal.

Archaeologists dig in Pompeii to uncover the dark side of the idyllic Roman city by finding the room of an enslaved person.

Archaeologists reveal the discovery of a Nero megastructure.

Discoveries uncover how the Romans ruled the seas for four centuries.

A storm delivers deadly driving conditions as the truckers struggle to deliver their loads.

Mexico's gifts to the world include the tomato, the avocado, tacos, tequila, Frida Kahlo, Oscar-winning directors, Mexican wrestling, Latino pop music, silver, rubber, and Mayan astronomy.

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An irritated traveler pushes officers to the limit; Haitian fruits may contain more than vitamins.

Mexico's gifts to the world include the tomato, the avocado, tacos, tequila, Frida Kahlo, Oscar-winning directors, Mexican wrestling, Latino pop music, silver, rubber, and Mayan astronomy.

The vets at Dr. K's are getting served lots of tricks during their treatments.

A variety of exotic and chaotic patients come in to the clinic.

Animal moms in need from reptiles to bunnies get a little help at Dr. K's.

Animals having an unlucky very bad day are lucky to find Dr. K's clinic.

At Dr. K's, shelled and scaly pets are just as loved as the furry ones; a large tegu lizard has trouble pooping; a pregnant pine snake may need a cesarean section; a sulcata tortoise bleeds after getting hit by a car.

Dr. Oakley treats a cat that swallowed a string and a pregnant reindeer with cancer.

Dr. Oakley faces a toxic emergency and removes the eye of an alpaca.

Dr. Oakley transports a bull by boat and sees chinchillas for a cuteness check.

Dr. Oakley treats a limping bison and a litter of puppies struggling to survive.

Dr. Oakley tries to outsmart a herd of bison and fights for the life of a cherished friend.