Sand Fish v. Gecko | Dead By Dawn

Sand fish and gecko compete for a meal.
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About Dead by Dawn:
In the first ever horror natural history series, find out why every night is a living terror in the wild. Each episode follows one deadly night, uncovering a new terrifying location. Nobody is safe, so who will make it to dawn?

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National Geographic Wild is a place for all things animals and for animal-lovers alike. Take a journey through the animal kingdom with us and discover things you never knew before, or rediscover your favorite animals!

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Sand Fish v. Gecko | Dead By Dawn

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Octopuses 101 | Nat Geo Wild

How many hearts does an octopus have? How do species like the mimic octopus camouflage themselves? Find out about these and other octopus facts.
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About National Geographic Wild:
National Geographic Wild is a place for all things animals and for animal-lovers alike. Take a journey through the animal kingdom with us and discover things you never knew before, or rediscover your favorite animals!

Get More National Geographic Wild:
Official Site:

Octopuses 101 | Nat Geo Wild

Nat Geo Wild

Channel: Nat Geo WILD
Published: 2017-08-16 15:12:09
Duration: 4M10S
Views: 408110
Likes: 2789
Favorites: 0

How to tell an alligator from a crocodile

This video explains how to tell an alligator from a crocodile and it’s probably not what you think! Watch to the very end before commenting.
And no, they aren’t variations within the same species, as many comment posters seem to think. They belong to two different families.
Channel: crocdoc2
Published: 2017-08-26 06:26:56
Duration: 6M58S
Views: 291829
Likes: 6250
Favorites: 0

10 Abnormally Large Dogs In The World

10 Abnormally Large Dogs In The World
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10 Largest Dogs Ever You Won’t Believe Exist

Some breeds of dogs have been around since ancient times. Most dogs are bred for a lot of different things, from protecting livestock, and protecting their owners, to being faithful and loyal companions.

But in order for a dog to be protective, it’s should be bred with the size it needs to be effective. Join us as we take a look at 10 of the largest dogs ever.

1. Hulk, the Pit Bull – The name ‘Hulk’ fits this pit bull dog perfectly because he is a giant 175lbs, and stands on his hind legs almost 5 feet tall. And while he might seem big and scary, his owners say that he is very gentle and is even trusted around their young son.

2. Freddy, the Great Dane – It’s probably no surprise to many that the Great Dane is one of the largest breeds of dog in the world, but Freddy takes the breed to a whole new level of big. He stands 7ft 6 inches on his hind legs, 2 feet taller than his owner, and weighs 200lbs!

3. Zorba, the English Mastiff – This English Mastiff was a legend when it comes to some of the world’s biggest dogs. You may know that when it comes to the combination of weight and height, nothing can beat this breed of canine. Many Mastiffs average up to 190 pounds, but it’s not unusual for these giants to weigh around 225 pounds at full maturity.

4. CH Samson, the Neapolitan Mastiff – This breed of Mastiff, called ‘Mastino Napolitano’ is actually an ancient dog breed, and that might explain the size of this rare dog. CH Samson was one of the largest and heaviest Mastiffs and weighed a whopping 225 pounds at just two and a half years old.

5. Zeus the Great Dane – Zeus, who lived in Otsego, Michigan, was named the world’s tallest dog by the Guinness World Records in 2012. He measured an incredible 44 inches from his feet to the middle of his shoulder blades.

6. Newfoundland – Unlike many larger breeds, the Newfoundland wasn’t bred to be a guard dog. Instead, it was bred to help fishermen. These big, muscular dogs are able to haul nets and lines from boats, pull carts and, most importantly, fetch anything that falls overboard into the water, including people.

7. The Irish Wolfhound – Like the Scottish deerhound, the Irish wolfhound, as its name implies, was bred to chase down wolves. Developed from war hounds into a dog that was used for hunting and guarding, the Irish wolfhound is ancient breed of canine, and may have been brought to Ireland as far back as 7000 B.C.

8. Leonberger – This large breed of dog began as a mix between a Newfoundland and a Saint Bernard. In the mid-1840s, Heinrich Essig of Leonberg, Germany, crossed a Newfoundland with a Saint Bernard for four generations, then added in a Pyrenean Mountain Dog to the mix.

9. Caucasian Shepherd – This big dog was bred to do one thing only, and that is to protect sheep from wolves, and any other predator that dares attack a shepherd’s flock. However, these dogs can and have been used to protect other livestock.

10. The Anatolian Shepherd – This canine was bred to be a shepherd’s companion and livestock guardian. The interesting thing about them is that they were bred for their size and color so that they matched the livestock that they were protecting.

Channel: Interesting Facts
Published: 2017-11-24 14:28:57
Duration: 9M33S
Views: 37322051
Likes: 112456
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From Egg to Frog in 7 Weeks!

The development of Wood Frog (Lithobates sylvaticus) eggs to froglets in 49 days, just 7 weeks!
Channel: NatureNorth
Published: 2014-04-13 17:41:10
Duration: 6M58S
Views: 3145178
Likes: 22385
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It’s a Goopy Mess When Pines and Beetles Duke it Out | Deep Look

An onslaught of tiny western pine beetles can bring down a mighty ponderosa pine. But the forest fights back by waging a sticky attack of its own. Who will win the battle in the bark?

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DEEP LOOK is a ultra-HD (4K) short video series created by KQED San Francisco and presented by PBS Digital Studios. See the unseen at the very edge of our visible world. Get a new perspective on our place in the universe and meet extraordinary new friends. Explore big scientific mysteries by going incredibly small.


Bark beetles are specialized, with each species attacking only one or a few species of trees. Ponderosa pines are attacked by dark brown beetles the size of a grain of rice called western pine beetles (Dendroctonus brevicomis).

In the spring and summer, female western pine beetles fly around ponderosa pine stands looking for trees to lay their eggs in. As they start boring into a ponderosa, the tree oozes a sticky, viscous clear liquid called resin. If the tree is healthy, it can produce so much resin that the beetle gets exhausted and trapped as the resin hardens, which can kill it.

“The western pine beetle is an aggressive beetle that in order to successfully reproduce has to kill the tree,” said U.S. Forest Service ecologist Sharon Hood, based in Montana. “So the tree has very evolved responses. With pines, they have a whole resin duct system. You can imagine these vertical and horizontal pipes.”

But during California’s five-year drought, which ended earlier this year, ponderosa pines weren’t getting much water and couldn’t make enough resin to put up a strong defense. Beetles bored through the bark of millions of trees and sent out an aggregating pheromone to call more beetles and stage a mass attack. An estimated 102 million trees – most of them ponderosa – died in California between 2010 and 2016.

— What is resin?

Resin – sometimes also called pitch – is a different substance from sap, though trees produce both. Resin is a sticky, viscous liquid that trees exude to heal over wounds and flush out bark beetles, said Sharon Hood, of the Forest Service. Sap, on the other hand, is the continuous water column that the leaves pull up to the top of the tree from its roots.

— Are dead trees a fire hazard?

Standing dead trees that have lost their needles don’t increase fire risk, said forest health scientist Jodi Axelson, a University of California extension specialist based at UC Berkeley. But “once they fall to the ground you end up with these very heavy fuel loads,” she said, “and that undoubtedly is going to make fire behavior more intense.”

And dead – or living – trees can fall on electric lines and ignite a fire, which is why agencies in California are prioritizing the removal of dead trees near power lines, said Axelson.

—+ Read the entire article about who’s winning the battle between ponderosa pines and western pine beetles in California, on KQED Science:

—+ For more information:
Check out the USDA’s “Bark Beetles in California Conifers – Are Your Trees Susceptible?”

—+ More Great Deep Look episodes:

This Mushroom Starts Killing You Before You Even Realize It

The Bombardier Beetle And Its Crazy Chemical Cannon

There’s Something Very Fishy About These Trees …

—+ See some great videos and documentaries from PBS Digital Studios!

Vascular Plants = Winning! – Crash Course Biology #37

Julia Child Remixed | Keep On Cooking

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—+ About KQED

KQED, an NPR and PBS affiliate in San Francisco, CA, serves Northern California and beyond with a public-supported alternative to commercial TV, Radio and web media.

Funding for Deep Look is provided in part by PBS Digital Studios and the John S. and James L. Knight Foundation. Deep Look is a project of KQED Science, which is also supported by HopeLab, the S. D. Bechtel, Jr. Foundation, the Dirk and Charlene Kabcenell Foundation, the Vadasz Family Foundation, the Gordon and Betty Moore Foundation, the Smart Family Foundation and the members of KQED.

Channel: Deep Look
Published: 2017-10-06 22:46:32
Duration: 4M46S
Views: 1221775
Likes: 17407
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