Episode 7. Zoo director Jim Breheny is excited to meet a king penguin chick. Keepers move a dangerous king cobra to a bigger exhibit, and the kiwis begin mating.
07:00 The Bronx Zoo 1/8s.
Episode 8. Keeper Lauren tries to train some stubborn Rothschild's giraffes. Meanwhile, staff help some Kihansi spray toads make a historic return to Tanzania.
07:48 Treehouse Masters 7/3s.
The Alaskan Treetop Sauna. Pete is off to build his second Alaskan treehouse! He sets out to create an outside-in treehouse and heats things up by installing a sauna in the trees.
08:36 Pit Bulls & Parolees 5/5s.
Battle Scars. A frightening rescue sends the Villalobos team racing into the city in search of a dog reportedly hit by a car. And with kennels at peak capacity, adoption is needed.
09:25 Pit Bulls & Parolees 5/6s.
Flood Watch. Tia receives a call about a puppy stuck in a pipe and enlists the help of the twins to rescue the dog. Later, it's up to Perry to help build up a shy puppy's confidence.
10:15 My Cat From Hell 8/1s.
Scout's Honor. Scout is so afraid of his tormentor, Caramel, he literally lives inside a kitchen cabinet. Allison's adopted Bengal cat, Cheeto, can use the toilet - but attacks her.
11:05 My Cat From Hell 8/2s.
A Scratch From The Past. Jackson meets Tara, whose cat, Cali, will not tolerate strangers. Plus, Kurt's cat, Kurtis Jnr, destroys and eats everything in sight.
11:55 Scaled 1/1s.
Poison Dart Frog Family. In Washington State, Greg and Lucas meet the Dasch family, who are looking to create a grand Mayan inspired terrarium for their Poisonous Dart Frogs.
12:50 Scaled 1/2s.
Princess And The Python. Stevie and the team design a sci-fi fantasy-themed enclosure for her Basilisk lizard. The guys add some princess magic to a showpiece for three Ball Pythons.
13:45 The Zoo: San Diego 2/2s.
Cubs Come Home. A pair of rescued mountain lion cubs are ready for their new habitat. Plus, a white rhino undergoes an intense procedure in the hope of saving the species!
14:40 Homestead Rescue 1/3s.
Trust Or Die. The Deeters are dog-mushers from Alaska, with a distrust of outsiders. But when disaster strikes, the Raneys must convince them to make drastic changes to their home.
15:35 Homestead Rescue 1/5s.
Nevada Thirst. It's the Raney's biggest challenge yet. Marty must find a way to build a house suitable for the ageing parents, while Misty attempts to grow crops in the Desert.
16:30 Dr. Jeff: Rocky Mountain Vet 2/12s.
New World. After 25 years in a tiny clinic, the team is moving to a new clinic with twice the space. When Dr. Jeff repairs a dog's knee, he makes a special connection with her owner.
17:25 The Bronx Zoo 1/8s.
Episode 8. Keeper Lauren tries to train some stubborn Rothschild's giraffes. Meanwhile, staff help some Kihansi spray toads make a historic return to Tanzania.
18:20 Dr. Jeff: Rocky Mountain Vet 3/1s.
Full Speed Ahead. Dr. Jeff heads out to a wild animal sanctuary to help an injured tiger. Meanwhile, Dr. Amy tackles exploratory surgery on a cat with a strange appetite.
19:15 Big Cat Tales 1/3s.
Battle On The Plains. Bahati the leopard struggles to protect her cubs from baboons and lions. Meanwhile, the arrival of six nomad male lions puts the entire Marsh Pride at risk.
20:10 Big Cat Tales 1/4s.
Faces From The Shadows. After a few months away, the team returns during the migration of the wildebeest. The Marsh Pride are missing after a skirmish with the six nomad male lions.
21:05 Amanda To The Rescue 1/1s.
Wildfire Puppy Rescue. Amanda rescues three dogs with special needs from the California wildfires, including a very pregnant Chihuahua that could give birth at any moment.
22:00 Amanda To The Rescue 1/2s.
Amanda's Hitchhiking Hounds. Amanda and her friend go on a road trip to rescue Jedi, a boxer whose blindness doesn't affect his energy. At the crowded shelter, she takes in 32 dogs.
22:55 My Cat From Hell 7/1s.
Crazy Cat Opens Doors. The behaviour of Sebastian, a violent cat, puts a new-born baby in jeopardy. Plus, a door opening wild cat, Zeus, is threatening to leave his owner.
23:50 My Cat From Hell 7/2s.
Four Blind Cats. A tantrum-prone cat lives in fear of the other two cats living in the same home. Plus, Jackson tutors a bouncer on how to handle his sweet Tasmanian devil of a cat.
00:45 Animal Cribs 2/2s.
Chinchilla Chill Pad. The team create an elaborate system of tunnels and towers for a family's seven chinchillas. The males and females are separated to prevent new additions.
01:40 Animal Cribs 2/3s.
Cat Build Gone Wild. A couple ask Antonio to design the perfect outdoor area for their Savannah cat and foster kittens. He builds connected catwalks and intricate climbing surfaces.
02:30 Keeping Up With The Kruger 1/6s.
Episode 6. A raw and unique glimpse into the day-to-day adventures of the dedicated band of people that keeps South Africa's Kruger National Park running.
03:15 Keeping Up With The Kruger 1/7s.
Episode 7. A raw and unique glimpse into the day-to-day adventures of the dedicated band of people that keeps South Africa's Kruger National Park running.
04:00 Alaskan Bush People 3/17s.
All That Matters. A storm hits Chichagof Island, threatening the Browns' safety as they set out for a new addition to Browntown, and oldest brother Matt returns for a new start.
04:45 Alaskan Bush People 3/18s.
Bear With Us. The Browns look to protect the newest family member from bears now seeking food on Chichagof Island. Matt races for his life as he tries returning home.
05:30 Nature's Strangest Mysteries: Solved 1/9s.
Octopus Houdini. Experts analyse and explain how a bird can sing without using its voice. Plus, how can an octopus escape and then disappear from its aquarium?
05:55 Nature's Strangest Mysteries: Solved 1/10s.
Animal Vandals. Experts try to answer some of nature's strangest mysteries like, what animals are breaking into thousands of cars every year? And, why did the fish cross the road?
Episode 8. Keeper Lauren tries to train some stubborn Rothschild's giraffes. Meanwhile, staff help some Kihansi spray toads make a historic return to Tanzania.
07:00 The Bronx Zoo 2/1s.
Miracle Cub. A young snow leopard cub is having difficulty walking and at risk of permanent disability. And, the zoo keepers prepare a new exhibit enclosure for gazelles.
07:48 Treehouse Masters 7/4s.
Off-The-Grid Getaway. Pete creates an off-the-grid escape that's all about peace, love, and treehouses. Once built, the owner adds a massive hammock in the trees.
08:36 Pit Bulls & Parolees 5/7s.
Can't Give Up. When a dog gets a chance at being adopted, the team drives to Michigan for the home check. But their journey is disrupted when Tia receives an urgent plea for help.
09:25 Pit Bulls & Parolees 5/8s.
Collision Course. A dangerous rescue mission is launched to secure two dogs spotted running wild on train tracks. Plus, a husband and wife come looking to adopt a dog.
10:15 My Cat From Hell 8/3s.
Nightmare On Cat Street. Jackson works with a couple whose lovable cat, Zachary, sprays all over the house. Plus, he meets up with troublemaking cat named Freddie Krueger.
11:05 My Cat From Hell 8/4s.
Feral Shop Cat. Jackson helps a couple whose cats fight so much, they moved to a bigger house to keep them apart. Plus, feral shop cat Greenie's spraying is threatening business.
11:55 Scaled 1/3s.
Samurai Snake Territory. The team must create a samurai-themed enclosure for two boa constrictors for the grand opening of Serpent Tattoo. Plus, Rachel faces her fear of snakes.
12:50 Scaled 1/4s.
Speak Easy Sand Boa Club. The team creates a gangster-themed enclosure for a collection of seven snakes. Greg gets a surprise when he takes his bearded dragon, Kevin, to the vet.
13:45 The Zoo: San Diego 2/3s.
Mabel's Joy. Hyena brothers are moved into the lions' habitat. Plus, the staff are ecstatic when a zebra shows signs of pregnancy and Mabel the pygmy hippo welcomes a calf.
14:40 Homestead Rescue 1/5s.
Nevada Thirst. It's the Raney's biggest challenge yet. Marty must find a way to build a house suitable for the ageing parents, while Misty attempts to grow crops in the Desert.
15:35 Homestead Rescue 1/6s.
Bearanoia. The Raney's are called to a failing Homestead in Colorado. Plus, Don makes a 40 mile commute each day leaving Lorinda alone and terrified of the bears and mountain lions.
16:30 Dr. Jeff: Rocky Mountain Vet 3/2s.
Race Against Time. Dr Jeff operates on a dog rushed in after a growth on her neck ruptures. Plus, the team performs a risky procedure on a pair of rescued miniature donkeys.
17:25 The Bronx Zoo 2/1s.
Miracle Cub. A young snow leopard cub is having difficulty walking and at risk of permanent disability. And, the zoo keepers prepare a new exhibit enclosure for gazelles.
18:20 Dr. Jeff: Rocky Mountain Vet 3/3s.
A Long Way From Home. Dr Jeff and his team head to a wildlife sanctuary to treat a pack of wolves. Later, when a kitten with a deformed leg needs treatment, Dr Baier steps up.
19:15 Big Cat Tales 1/5s.
Survivors Of The Savanna. Jackson observes a group of five cheetahs cooperatively hunting. Meanwhile, Jonathan witnesses a spectacular river crossing of thousands of wildebeest.
20:10 Big Cat Tales 2/1s.
Kingdom Of Predators. A dispersed Marsh Pride faces weakened protection from the six male warrior lions. Plus, a cheetah works tirelessly to raise her three new cubs.
21:05 Animal Cops Houston 19/11s.
Episode 11. Investigators are called out after disturbing reports of a large number of dogs held captive in make-shift pens. Plus, Octavio Gonzales receives a call about an abandoned horse.
22:00 Animal Cops Houston 19/1s.
Cat Hoarding House. The SPCA team embarks upon the huge task of removing birds from a live crime scene. Plus, Debbie Michelson makes an intervention into a family overrun with dogs.
22:55 My Cat From Hell 7/3s.
Scary Tails. Jackson works with a cat, Skylar, who's literally afraid of her own tail. Plus, Jackson meets up with a pair of guardians whose cat is constantly knocking things over.
23:50 My Cat From Hell 7/4s.
Katrina Storms in. Jackson meets up with a soft-spoken musician who feels abused by her adopted cat and is ashamed that she can't figure out how to prevent her cat's behaviour.
00:45 Animal Cribs 2/4s.
Bunny Beach Bungalow. A couple need Antonio's help to gain back control of their space. Their five rescue bunnies have taken over the house and they want a designated area for them.
01:40 Animal Cribs 2/5s.
Pot-Bellied Pig Palace. A family ask for Antonio to design the ultimate pig paradise. Mr Pickles needs a new house, mud pit and plenty of space to run around in the garden.
02:30 Keeping Up With The Kruger 1/8s.
Episode 8. A raw and unique glimpse into the day-to-day adventures of the dedicated band of people that keeps South Africa's Kruger National Park running.
03:15 Keeping Up With The Kruger 1/9s.
Episode 9. A raw and unique glimpse into the day-to-day adventures of the dedicated band of people that keeps South Africa's Kruger National Park running.
04:00 Alaskan Bush People 3/19s.
Browntown Boom. Billy's dream of self-sustainability is tested as the Browns start their biggest project yet, while Matt and Bam help Browntown's expansion with their own venture.
04:45 Alaskan Bush People 3/20s.
Dead In The Water. The Browns face wild weather as they bring a haul to Port Alexander. The Integrity starts to show its age and the Browns get stranded in the middle of the water.
05:30 Nature's Strangest Mysteries: Solved 1/11s.
Scorpion Night Lights. Experts answer some of nature's strangest mysteries like, how and why scorpions glow in the dark and what is the ominous mass looming over an Icelandic lake?
05:55 Nature's Strangest Mysteries: Solved 1/12s.
Snowboarding Crow. Experts explain how a moose got stuck in an apple tree. Plus, why is a crow snowboarding on a jam jar lid and is Yellowstone's super volcano about to blow?
Miracle Cub. A young snow leopard cub is having difficulty walking and at risk of permanent disability. And, the zoo keepers prepare a new exhibit enclosure for gazelles.
07:00 The Bronx Zoo 2/2s.
A Polar Bear In The City. 26-year old polar bear, Tundra, is one of the zoo's favourite inhabitants. But, after his behaviour changes, keepers are worried about signs of disease.
07:48 Treehouse Masters 7/5s.
Treehouse Utopia. Pete is in Utopia for a joint venture: a treehouse B&B built for romance. It will have stained glass, a bedroom - and the biggest bathroom Pete has ever built.
08:36 Pit Bulls & Parolees 5/9s.
Out of the Dark. Tia recruits the twins to rescue a pit bull from the bottom of a deep hole. Then, Mariah helps with an adoption to a couple reeling from the tragic loss of their dog.
09:25 Pit Bulls & Parolees 5/2s.
Shell Shocked. Tania oversees the rescue of ten dogs left to die in deplorable conditions. Tia helps a family find the perfect companion for their special needs teenager.
10:15 My Cat From Hell 8/5s.
Kitten Impossible: Roadtrip Rescue. The Cat Daddy takes the show on the road! In order save the lives of 50 kittens from LA shelters, he drives them back to his roots in Boulder, CO.
11:05 My Cat From Hell 8/6s.
Mojito Cat. Jackson deals with a young man with a genuine cat phobia, and he returns to Colorado to keep his favourite kitten from the kitten rescue road trip in her adoptive home.
11:55 Scaled 1/5s.
The Incredible Bearded Dragons!. The team creates a circus-themed enclosure for bearded dragon, Nash. Jason helps Greg with a surprise party and suggests bringing his tarantula.
12:50 Scaled 1/6s.
Monkey-Tailed Skink Adventure. The team devises a 'Bill & Ted's Excellent Adventure'-themed terrarium. Triathlete Jordan wants a sport-themed modern art enclosure for her lizard.
13:45 The Zoo: San Diego 2/4s.
Cheetah On The Run. The staff develop an innovative course of treatment when a cheetah has an injury. Plus, the zoo hosts the only pair of platypuses outside Australia.
14:40 Homestead Rescue 1/7s.
Wolves At The Door. The Raneys help the Johnson family who have no drinking water or food sources. Their dogs have been killed by a mystery predator and worry they are next.
15:35 Homestead Rescue 1/8s.
Trapped. The Raneys assist two Montana homesteaders who face being trapped on their property. When a medical emergency strikes, the Raneys face their first ever failed rescue.
16:30 Dr. Jeff: Rocky Mountain Vet 3/4s.
On The Edge. When an Eskimo dog arrives with a broken jaw Dr Jeff must uncover the cause. Plus, Dr Nichols and Dr Jeff have their hands full treating some uncooperative yaks.
17:25 The Bronx Zoo 2/2s.
A Polar Bear In The City. 26-year old polar bear, Tundra, is one of the zoo's favourite inhabitants. But, after his behaviour changes, keepers are worried about signs of disease.
18:20 Dr. Jeff: Rocky Mountain Vet 3/5s.
Born To Run. Dr Jeff and Dr Petra work together to save a beloved pet husky's leg. Meanwhile, specialist Dr Baier has a scare during a routine treatment of pet pig Strawberry.
19:15 Big Cat Tales 2/2s.
Stripes Vs Spots. Jonathan discovers the secretive den site of Dada the lioness' newborn cubs. Meanwhile, Olare, the leopard, displays a rarely seen mating ritual.
20:10 Big Cat Tales 2/3s.
Peril On The Horizon. Chongo is unwilling to share buffalo with the rest of the pride and Fig continues to give vital lessons to the young cub and a cheetah and hyena battle.
21:05 Meet The Orangutans 1/5s.
Episode 5. Gelison arrived at Sepilok at just one year old, and was traumatised from losing his mother. While settling in better, his skiving antics and bully-boy tactics are pushing limits.
21:30 Meet The Orangutans 1/6s.
Episode 6. It's feeding time for the residents of Sepilok, and the orangutans are well cared for. However, they need to learn to find food themselves, and this can be tricky.
22:00 Wildest Europe 1/3s.
The Alps. Discovers Europe's highest mountain range and one of its largest intact ecological ranges, home to specialised animal species including the alpine ibex and the grey wolf.
22:55 My Cat From Hell 7/5s.
Breaking Bald. Jackson enters Ellen's world, one that's crawling with neighbourhood feral cats, who she's been feeding and trying to contain virtually by herself for 20 years.
23:50 My Cat From Hell 7/6s.
Brooklyn Cat Fight. Jackson makes his way to Brooklyn, where a couple are seeing their relationship suffer over the ongoing blood feud between their two cats.
00:45 Animal Cribs 2/6s.
Backyard Barnyard. A family shares their crowded home with rescued animals, including two mini horses that sleep in the master bedroom! Antonio builds them the ultimate horse barn.
01:40 Animal Cribs 2/7s.
Pygmy Goat Playground. A family's two Nigerian dwarf goats wreak havoc in their backyard! So, designer Antonio transforms it into a fun goat playground, including a climbing tower.
02:30 Keeping Up With The Kruger 1/10s.
Episode 10. A raw and unique glimpse into the day-to-day adventures of the dedicated band of people that keeps South Africa's Kruger National Park running.
03:15 Keeping Up With The Kruger 1/11s.
Episode 11. A raw and unique glimpse into the day-to-day adventures of the dedicated band of people that keeps South Africa's Kruger National Park running.
04:00 Alaskan Bush People 3/21s.
One Brown Down. The Browns face impossible odds as they seek the final pieces for their off the grid dream. Noah misses his girl, while Bam has a surprise announcement.
04:45 Alaskan Bush People 3/22s.
All Falls Down. Hopes for the wind turbine are threatened when Bear and Gabe make an error. Noah and Rhain reunite and Matt takes on a project to increase Browntown's food storage.
05:30 Nature's Strangest Mysteries: Solved 1/13s.
Disco Spider. Experts explain why some spiders dance and what is the weird, bubbling foam engulfing a whole town? Plus, what mysterious creature is preying on Europe's sheep?
05:55 Nature's Strangest Mysteries: Solved 1/14s.
Cuddly Shark. Experts explain what causes a tiger shark to hug a diver. Plus, why do pigs swim in the Caribbean and what is washing up in the thousands on the shores of Oregon?
A Polar Bear In The City. 26-year old polar bear, Tundra, is one of the zoo's favourite inhabitants. But, after his behaviour changes, keepers are worried about signs of disease.
07:00 The Bronx Zoo 2/3s.
Bears Will Be Bears. Armani the Aardvark suffers from a mouth infection which seems to only get worse every day. Plus, the brown bears keep digging up and destroying their exhibit.
07:48 Animal Cribs 2/8s.
Subterranean Paradise. Firefighter Ricky rescued a Burmese python from a burning building. In one of his biggest projects Antonio transforms a basement into an epic snake habitat.
08:36 Animal Cribs 2/9s.
Dragons' Den. Antonio meets a family with two bearded dragons stuck in a tank in a bedroom. He builds a backyard dragon clubhouse with a cool hangout spot for the family.
09:25 My Cat From Hell 7/7s.
Gotham Feral Cats. Jackson visits New York City to meet a father and son who've been taking care of a feral cat colony in their backyard and are desperately in need of help.
10:15 My Cat From Hell 7/8s.
Twinkle, Twinkle, Little Star. In a show first, Jackson helps a cat - who can't get along in its rescue home - to move in with a foster family who he's hopeful will adopt.
11:05 The Zoo: San Diego 1/9s.
Miracle Calf. A white rhino is pregnant with a very special calf. Plus, Connor the bone-loving Malayan tiger has tooth trouble and the vets step in to help.
11:55 How Do Animals Do That? 1/17s.
Episode 17. How do caterpillars transform into magnificent butterflies in their cocoon? Plus, why are cats' tongues the way they are? Experts answer these questions and more!
12:25 How Do Animals Do That? 1/18s.
Episode 18. Why are some cats cross-eyed? How do meerkats eat poisonous scorpions and how can hippos sleep whilst holding their breath? Experts answer these questions and more!
12:50 How Do Animals Do That? 1/19s.
Episode 19. How does a squirrel take on a dangerous rattle snake? What makes eagles' eyes so powerful? Plus, why is the planet overrun with bugs? Experts answer these questions!
13:20 How Do Animals Do That? 1/20s.
Episode 20. Do parrots really know what they're talking about? How do electric eels not electrocute themselves? Plus, why are panda's black and white? Experts answer these questions!
13:45 Alaskan Bush People 3/23s.
Field Of Dreams. Billy gets overambitious on a late barter as the family tries to secure their winter stores. Plus, a rogue bear plays havoc with Browntown and a nearby logging camp.
14:40 Alaskan Bush People 3/24s.
Wind And A Prayer. The Browns try closing a deal to help restore a wind turbine, but when Browntown runs out of gas, they must get creative. Plus, Noah gets bad news from his girl.
15:35 Dr. Jeff: Rocky Mountain Vet 2/8s.
Risky Business. Dr. Jeff must act fast to save a kitten with head trauma. Dr. Amy treats a dog with a weak heart. And a Good Samaritan helps a family when their dog is hit by a car.
16:30 Dr. Jeff: Rocky Mountain Vet 2/9s.
A Second Chance. Dr. Jeff and his team helps two Chihuahuas found abandoned in a storm drain. Then Dr. Jeff makes a discovery when a cat's odd eating habits put its life in danger.
17:25 The Bronx Zoo 2/3s.
Bears Will Be Bears. Armani the Aardvark suffers from a mouth infection which seems to only get worse every day. Plus, the brown bears keep digging up and destroying their exhibit.
18:20 The Zoo: San Diego 2/2s.
Cubs Come Home. A pair of rescued mountain lion cubs are ready for their new habitat. Plus, a white rhino undergoes an intense procedure in the hope of saving the species!
19:15 My Cat From Hell 7/7s.
Gotham Feral Cats. Jackson visits New York City to meet a father and son who've been taking care of a feral cat colony in their backyard and are desperately in need of help.
20:10 My Cat From Hell 7/8s.
Twinkle, Twinkle, Little Star. In a show first, Jackson helps a cat - who can't get along in its rescue home - to move in with a foster family who he's hopeful will adopt.
21:05 Alaskan Bush People 4/10s.
The Buffalo Trail. The Wolfpack seizes an opportunity to stockpile meat with their first-ever buffalo hunt. Noah and Bam are left behind to build a mine-cooled meat locker.
22:00 Homestead Rescue 1/3s.
Trust Or Die. The Deeters are dog-mushers from Alaska, with a distrust of outsiders. But when disaster strikes, the Raneys must convince them to make drastic changes to their home.
22:55 Keeping Up With The Kruger 1/12s.
Episode 12. A raw and unique glimpse into the day-to-day adventures of the dedicated band of people that keeps South Africa's Kruger National Park running.
23:50 Keeping Up With The Kruger 1/13s.
Episode 13. A raw and unique glimpse into the day-to-day adventures of the dedicated band of people that keeps South Africa's Kruger National Park running.
00:45 Dr. Jeff: Rocky Mountain Vet 2/8s.
Risky Business. Dr. Jeff must act fast to save a kitten with head trauma. Dr. Amy treats a dog with a weak heart. And a Good Samaritan helps a family when their dog is hit by a car.
01:40 Dr. Jeff: Rocky Mountain Vet 2/9s.
A Second Chance. Dr. Jeff and his team helps two Chihuahuas found abandoned in a storm drain. Then Dr. Jeff makes a discovery when a cat's odd eating habits put its life in danger.
02:30 Animal Cribs 2/8s.
Subterranean Paradise. Firefighter Ricky rescued a Burmese python from a burning building. In one of his biggest projects Antonio transforms a basement into an epic snake habitat.
03:15 Animal Cribs 2/9s.
Dragons' Den. Antonio meets a family with two bearded dragons stuck in a tank in a bedroom. He builds a backyard dragon clubhouse with a cool hangout spot for the family.
04:00 The Zoo: San Diego 1/9s.
Miracle Calf. A white rhino is pregnant with a very special calf. Plus, Connor the bone-loving Malayan tiger has tooth trouble and the vets step in to help.
04:45 Treehouse Masters 6/9s.
A Treehouse Fit For A Viking. Pete takes on his first international build in Norway. Working with local builder, Frode, the 24 ft high retreat gives stunning views of a nearby lake.
05:30 Nature's Strangest Mysteries: Solved 1/15s.
Unicorn Of The Sea. Narwhals are the unicorns of the sea, but what do they use their extraordinary tusks for? What animal has transformed Yellowstone? Experts explain it all!
05:55 Nature's Strangest Mysteries: Solved 1/16s.
Rattleless Rattlesnake. Experts explain where to find an enchanted underwater forest. Plus, why have some rattlesnakes on a remote Mexican island lost their rattle?