Rodents are mammals characterized by a pair of broad, sharp-edged, chisel-like incisor teeth that are firmly inserted in both jaws and are used in gnawing vegetation. The front surface of each incisor tooth is composed of enamel, and the hind surface is of soft dentine wears away during the process of gnawing so that the teeth are constantly kept sharp. Shown above is a beaver sporting bright orange teeth; the reason they are orange is because of an unusually high concentration of iron in the enamel.

Unlike human teeth, the incisors of rodents don't have roots, and they never stop growing! To keep these teeth from growing into their brains, rodents grind their teeth against each other. This friction is similar to using a grindstone to sharp ...

Different animals have different collective names, which are what groups of the animals are called.

Let's see how many of these you already know; check your answer my clicking the button underneath each photo.





















...

The hairy frogfish (Antennarius striatus) is a marine fish with spines resembling strands of hair - and it can change color. This small fish grows up to 22 cm (8.7 in) long, and has a rounded, extensible body. Its large mouth is forwardly extensible, allowing it to swallow prey as large as itself! The coloring of its body is extremely variable because individual fish tend to match their living environments.

Frogfishes have the capacity to change coloration and pigment pattern, taking only a few weeks to adapt. The dominant coloration varies from yellow to brownish-orange, passing through a range of shades, but it can also be green, gray, brown, almost white, or even completely black without any pattern. Body and fins can be marked with roug ...

The arctic fox is an incredibly hardy animal that can survive frigid Arctic temperatures as low as –58°F (-50°C) in the treeless lands where it makes its home. It has furry soles, short ears, and a short muzzle - all-important adaptations to the chilly clime. Arctic foxes live in burrows, and in a blizzard they may tunnel into the snow to create shelter.

Arctic foxes have beautiful white (sometimes blue-gray) coats that act as very effective winter camouflage. The natural hues allow the animal to blend into the tundra's ubiquitous snow and ice. When the seasons change, the fox's coat turns as well, adopting a brown or gray appearance that provides cover among the summer tundra's rocks and plants.

Source: http://animals.nationalgeographic.com/ ...

When you turn on your TV, it is the definition of ironic to watch the news channels for information about planet mass destruction. Whilst when you step outside your door, it is quite alarming and obvious that our earth is suffering. When every person around you, from toddlers to elderly, own some for of technology, with no means of recycling old items. When students, each with their own copies of pages. When potable water has not yet reached the most needy of nations. When human greed is apparent with every innovative idea claiming to "revolutionize "a domain brought up to make  a quick buck. Drilling, mining, industrialization, politics, scavenging for resources, suffocating our environment... This may all seem negative, but coming from a ...

The Hyalinobatrachium dianae glassfrog was just discovered! And people are saying he looks familiar.

"Rather than having to photograph from behind wire fences, [I hope to] capture images of animals such as lions in the wild, free and unrestrained," writes Greg Van Dugteren of this image taken at New Zealand's Orana Wildlife Park.

Here are the most accurate measurements of the ocean's biggest animals. These are confirmed measurements, unlike many found on the internet that state outrageous numbers.

After watching this incredible footage, I can't help but notice the similarities between humans and chimpanzees - it's quite fascinating!

Enjoy

If you find yourself looking around the table over the holiday and thinking, “I can’t believe I’m related to these people,” just be glad you’re not a mongoose. If you were, you might be thinking, “I can’t believe I’ve mated with all of these people.” Why? For mongooses, it's actually safer to have sex with a close relative than risk death by venturing out into the world to find a mate.

If only all of life's problems could be solved by backing awkwardly into them.

Geckos have 500,000 keratinous hairs on their feet, which split at the ends to create a large surface area. The hairs allow geckos to scale smooth vertical surfaces.

Bought from a pet shop, Alex the parrot was the subject of a 30-year experiment by psychologist Irene Pepperberg, who demonstrated that language, communication and intelligence are not just the result of a large primate brain; “lesser” animals also possess high cognitive ability. Alex could count, knew more than 100 words and even understood syntax. When he died, his last words to Pepperberg were: “You be good, see you tomorrow. I love you”

Deforestation has left sloths in the wild almost homeless, but a woman in Costa Rica opened up a rescue centre to make sure the species survives. She has a sloth nursery that has provided us with some super cute sloth footage that helps raise awareness of the struggles faced by this species.

The blue whale is not only the largest animal alive currently, but is likely the largest animal ever to have lived.

Depending on the location, blue whales can grow to be 33 meters (108 feet) and weigh as much as 181 metric tons (200 imperial tons).They can live to be 90 years old and ingest about 3.6 metric tons (4 imperial tons) of krill each day. Blue whale are considered endangered by the IUCN.

This is Ippo, a three-month-old Italian zonkey. She is the result of a union between a male zebra and a female Amiata donkey, which is an endangered breed of donkey native to southern Tuscany. Genetic differences between the zebra and the donkey - donkeys have 62 chromosomes and zebras have between 32 and 46 - mean that hybrids like this are most often the result of a male zebra pairing with a female donkey. So far there have only been three recorded cases of a male donkey siring a zebra hybrid. ...

Wombat droppings are cube-shaped. This prevents them from rolling away when marking their territory. These cube-shaped poop looks like, but doesn't taste like chocolate brownies.

The aye-aye lives in the forests of Madagascar. Despite looking like a very scared rodent, the aye-aye is a kind of lemur with a bushy tail and super-thin, elongated middle fingers that they use to dig grubs out of hollow branches. Aye-ayes also have huge lower incisors to chew through wood and bamboo—and in captivity they’ve been known to chew through concrete cinder blocks ...

The Mandarin duck is a sexually dimorphic species, meaning males and females differ in appearance. The male has a rich, colorful appearance, which includes brown cheeks and a long brown and white crown sweeping back from the top of the head. The chest is dark purple, with black and white strips, and the wings are brown with an iridescent blue-green edge. This striking coloration helps the male attract the less-colorful females, which display brownish-black plumage with white markings around the eyes and along the throat. ...

This is a Palm Cockatoo, also know as the Goliath Cockatoo.

Palms are distinguished by their size, huge beak (second only to the Hyacinth Macaw among psittacines and largest proportionate to size), solid black feather coloration, large open crest, bare red cheeks, and red and black tongue. You have to see their tongues to believe the coloration. It's amazing.

Palm Cockatoos are severely threatened. They are CITES Appendix I birds and are protected in Australia.

As a testament to their rarity, typical prices in the U.S. for Aterrimus Palms are around $8000 and Goliaths around $14,000. Perhaps contributing to their rarity is the fact that, according to both Low and Forshaw, they lay only one egg per clutch.

...

This photo shows a diver almost being eaten by a whale shark, the world's largest fish species. Marine photographer Mauricio Handler captured the intense moment during a dive in Isla Mujeres, Mexico, when more than 600 of the 12-metre-long animals gathered to feed on tuna spawn.

This is the spectacular Leafy Seadragon. Its dangling skin disguises the vulnerable species as floating seaweed. Like seahorses, the male Leafy Seadragon carries the eggs, which are bright pink when the female first deposits them, but turn purple or orange when they're ready to hatch after nine weeks.

Blunt headed tree snakes, a genus of colubrid snakes found in Mexico, Central America, and the northern part of South America.

Meet the pistol shrimp. It is known to be the loudest animal and can emit a sound up to 200 decibels which it uses to stun its prey using its pincers. Check out the video below:

This is a close up of a llama eye. The strange "ruffles" are called 'iridic granules' (corpora nigra) and they are used to to shade the eye from bright sunlight. In bright light these iridic granules can actually interlock to completely cover the centre of the pupil. This leaves just two holes open on either end of the pupil, reducing the amount of light that can enter the eye. These odd looking structures are also found in horses, cattle and sheep.