YouVideo your free video online video clips and video downloads on youvideo.eu

Worlds deepest living fishes survives under pressure

fishes survives under the largest pressure during millions of years. peixe das profundezas sobrevive sob a maior pressao do mar durante milhÃµes de anos. Prehistoric fish are various groups of fishes that lived before recorded history. A few, such as the coelacanth still exist today and are considered living fossils. The first fish and the first vertebrates, were the ostracoderms, which appeared in the Cambrian Period, about 510 million years ago, and became extinct at the end of the Devonian, about 350 million years ago. Ostracoderms were jawless fishes found mainly in fresh water. They were covered with a bony armor or scales and were often less than 30 cm (1 ft) long. The ostracoderms are placed in the class Agnatha along with the living jawless fishes, the lampreys and hagfishes, which are believed to be descended from the ostracoderms. The first fish with jaws, the acanthodians, or spiny sharks, appeared in the late Silurian, about 410 million years ago, and became extinct before the end of the Permian, about 250 million years ago. Acanthodians were generally small sharklike fishes varying from toothless filter-feeders to toothed predators. They were once often classified as an order of the class Placodermi, another group of primitive fishes, but recent authorities tend to place the acanthodiaes or that both groups share a common ancestor. The placoderms, another group of jawed fishes, appeared at the beginning of the Devonian, about 395 million years ago, and became extinct at the end of the Devonian or the beginning of the Mississippian (Carboniferous), about 345 million years ago. Detailed anatomical studies of fossil remains by the Swedish scientist Erik StensiÃ¶ strongly suggest that the placoderms were closely related to sharks. Placoderms were typically small, flattened bottom-dwellers, however, many, particularly the arthrodires, were active midwater predators. Dunkleosteus was the largest and most famous of these. The upper jaw was firmly fused to the skull, but there was a hinge joint between the skull and the bony plating of the trunk region. This allowed the upper part of the head to be thrown back, and in arthrodires, this allowed them to take larger bites. The cartilaginous-skeleton sharks and rays, class Chondrichthyes, which appeared about 370 million years ago in the middle Devonian, are generally believed to be descended from the bony-skeleton placoderms. The cartilaginous skeletons are considered to be a later development. The modern bony fishes, class Osteichthyes, appeared in the late Silurian or early Devonian, about 395 million years ago. The early forms were freshwater fishes, for no fossil remains of modern bony fishes have been found in marine deposits older than Triassic time, about 230 million years ago. The Osteichthyes may have arisen from the acanthodians. A subclass of the Osteichthyes, the ray-finned fishes (subclass Actinopterygii), became and have remained the dominant group of fishes throughout the world. It was not the ray-finned fishes, however, that led to the evolution of the land vertebrates. The ancestors of the land vertebrates are found among another group of bony fishes called the Choanichthyes or Sarcopterygii. Choanate fishes are characterized by internal nostrils, fleshy fins called lobe fins, and cosmoid scales. The choanate fishes appeared in the late Silurian or early Devonian, more than 390 million years ago, and possibly arose from the acanthodians. The choanate fishes include a group known as the Crossopterygii, which has one living representative, the coelacanth (Latimeria). During the Devonian Period some crossopterygian fishes of the order (or suborder) Rhipidistia crawled out of the water to become the first tetrapods. The story of vertebrate evolution started in the seas of the Cambrian period, when jawless, toothless, soft-bodied fishlike creatures wriggled through the water, sucking up microscopic food particles. Only after tough, non-decaying bone was developed (initially as a scaly outer covering and later within the body) did fossils form and become preserved in the rocks. And only then could paleontologists take up the story with any certainty. The earliest traces of bony scales are found in rocks of the Late Cambrian period, and the first recognizable vertebrate fish has been found in Australian rocks of Early Ordovician age. So, the first chapter in the vertebrate evolution starts with the ancient Arandaspis, a fish about 6in/15cm long with no jaws, no teeth and no fins other than a tail. It did, however, have gills and a stiffening rod of cartilaginous material (the notochord) that served as a backbone. w1tv 10 minutes. http://w1tv.sites.uol.com.br

Added by: blogpost_biz

Time: 01:00
Views: 1341 | Comments: 0

13 Hot Sexy Bikini Body Workout so Watch Me Shrink

Go to http://www.conikitv.com watch Niki shrink into a SEXY BIKINI BEACH BABE. Follow Con & Niki's daily interval workouts and exercise routines, exercise how to videos, healthy recipes, the world famous rapid fat loss and detox diet. Distributed by Tubemogul.

Added by: blogpost_biz

Time: 01:00
Views: 1341 | Comments: 0

Funny car accidents / Lustige AutounfÃ¤lle

Frau am Steuer ;)

Added by: blogpost_biz

Time: 01:00
Views: 1341 | Comments: 0

witzig kurios fiat polen unglaublich falschfahrer funny bambino umgebaut polizei obama

Ein in Polen umgebauter Fiat Bambino dessen Karosserie in falscher Richtung gesetzt wurde.

Added by: blogpost_biz

Time: 01:00
Views: 1341 | Comments: 0

The Ultimate "Boy Meets World" Funny Moments Collection

This is a collection of the funniest moments from the show "Boy Meets World". I grew up watching this show and I felt like composing all of its funniest moments together in a video for myself and other fans of the show. The majority of these scenes were taken from seasons six and seven, because there were so many great Eric moments in those seasons. Eric is definitely the funniest character of the show and you'll see him and his antics the most throughout this video. So here it is, The Ultimate "Boy Meets World" Funny Moments Collection. Enjoy! Here's a summary of the series: One of the most durable offerings of ABC's Friday night TGIF sitcom lineup, Boy Meets World premiered September 24, 1993. Set in Philadelphia, the series starred Ben Savage as Cornelius A. "Cory" Matthews, who at the outset of the program was 11 years old. Hoping to make sense of the world around him and to hack his way through the thorny thicket of "tween-age" (and later teenage) life, Cory found a kindred spirit in fellow 11-year-old Shawn Hunter (Rider Strong), who lived in a trailer camp with his combative parents. Cory himself resided in a comfortable suburban home with dad Alan (William Russ), mom Amy (Betsy Randle), footloose older brother Eric (Will Friedle) and precocious kid sister Morgan (played first by Lily Nicksay, then by Lindsay Ridgeway); near the end of the series' run, Amy gave birth to a fourth child, a boy named Joshua. At school, Cory was kept in a state of constant terror and confusion by his mercurial teacher George Feeny (William Daniels) -- and making things worse, Feeny lived right next door to the Matthews family. On a more pleasant note, Cory harbored a crush for his classmate Topanga Lawrence (Danielle Fishel), a feeling that would blossom into true love as the series rolled on. During his elementary school years, Cory also palled around with a nerdish intellectual named Stuart Minkus (Lee Norris). When Cory entered John Adams High School, he discovered, to his horror, that Mr. Feeny was now his principal. Also, Cory was faced with a new nemesis in the form of the bullying Harley Kiner (Danny McNulty). Even so, high school had its good points, including the presence of Cory's old friends Shawn and Topanga and his new buddies Joey (Blake Soper) and Frankie (Ethan Suplee) -- not to mention the school's coolest teacher, cycle-riding Mr. Jonathan Turner (Anthony Tyler Quinn). The bond between Cory and Mr. Turner grew stronger when the latter became legal guardian of Shawn, whose parents had briefly vanished. (Shawn would later move back with his truck driver dad, Chet [Blake Clark]). During their high school graduation, Topanga impulsively proposed to Cory. The following year, they both enrolled in nearby Penbrook College, which was already being attended by Cory's brother Eric. Eric, in turn, was rooming with Jack Newman (Matthew Lawrence)...and when it turned out that Jack was the long-lost half brother of Shawn Hunter, Shawn moved in as well, simultaneously inaugurating a romance with Angela Moore (Trina McGee-Davis). Eventually, Shawn left, whereupon Eric and Jack found themselves with a new roomie, a no-nonsense, take-charge gal named Rachel McGuire (Maitland Ward). Penbrook College also proved to be a life-altering experience for dour Mr. Feeny, who fell in love with and married the schools Dean of Admissions, Ms. Bolander (Bonnie Bartlett). During the series' final season, Cory and Topanga were wed and moved to New York with Shawn and Eric, Angela moved to Europe with her dad, and Rachel and Jack joined the Peace Corps. Boy Meets World remained an ABC Friday night fixture until its cancellation on September 8, 2000.

Added by: blogpost_biz

Time: 01:00
Views: 1340 | Comments: 0

Sexy model Emily can't wait!

Look at her as she is playing on the fluffy rug. Mmmmmmmmh...

Added by: blogpost_biz

Time: 01:00
Views: 1340 | Comments: 0

Shakira -Waka Waka (This Time For Africa)(ErÃ¶ffnungskonzert FIFA WM 2010)

All Rights Belong to the ZDF Shakira - This Time For Africa(ErÃ¶ffnungskonzert FIFA WM 2010) shakira,this,time,for,africa,fifa,wm,2010,full,highlights,south,africa,germany,opening,brasil,world,champion,sexy,shakira,concert,live

Added by: blogpost_biz

Time: 01:00
Views: 1338 | Comments: 0