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About Frogs

Four hundred million years ago the most advanced forms of life on Earth, the fishes, lived in the water. Plants and insects alone occupied the land until the appearance of the amphibians more than 350 million years ago. Almost all amphibians have features that fall between those of fishes and those of reptiles. The most commonly known amphibians are frogs, toads, and salamanders. Although most have changed very little since they first began to breathe on land, some of the early amphibians were the ancestors of today's reptiles, birds, and mammals.

The word amphibian comes from the Greek amphi, meaning "both," and bios, meaning "life." It describes cold-blooded animals with backbones that pass their lives both in fresh water and on land. Because amphibians live in water and on land, their natural environments are shores, ponds, marshes, swamps, and low-lying meadows.

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Relates News And Gossip

TCU passes Boise State in BCS standings (AP)

AP - TCU has passed Boise State in the Bowl Championship Series standings, putting the unbeaten Horned Frogs in position to be this season's BCS buster.

TCU passes Boise State in BCS standings

TCU has passed Boise State in the Bowl Championship Series standings, putting the unbeaten Horned Frogs in position to be this season's BCS buster.

Storylines: UConn focus on football?

• Will BYU spoil TCU's bowl bid? There are a few things you should know about TCU defensive end Jerry Hughes: He used to be a great running back, he's since blossomed into the nation's best collegiate defensive end, and he tends to hunt BYU QB Max Hall like a man possessed. Last season, TCU spoiled BYU's BCS bid, and Hughes' four sacks and persistent disruption were a big reason why. This year, the roles have reversed. The Frogs head to Provo ranked eighth in the BCS standings, and the Cougars hope to spoil those bowl dreams. TCU needs this win to remain neck-and-neck with Boise State in the BCS conversation, and deploying Hughes and the rest of a speedy, athletic defensive front is the best way to set up Hall for a repeat of his seven-sack, two-pick performance from 2008.

Patterson not shocked by Frogs' fall in poll (AP)

AP - TCU coach Gary Patterson isn't surprised by his undefeated team's drop in The Associated Press poll.

On Alien World, It Rains Rocks (SPACE.com)

SPACE.com - On Earth, strange things, including frogs and fish, sometimes fall from the sky, but on a distant extrasolar planet, the weather could be even weirder: When a front moves in, small rocks rain down on the surface, a new study suggests.

Mice Levitated in Lab (LiveScience.com)

LiveScience.com - Other researchers have made live frogs and grasshoppers float in mid-air before, but such research with mice, being closer biologically to humans, could help in studies to counteract bone loss due to reduced gravity over long spans of time, as might be expected in deep space missions or on the surfaces of other planets.

Red Riding

Film Reviews: A compelling, disturbing crime drama that leapfrogs through a decade's worth of corruption and venality.

Traffic noise could be ruining sex lives of frogs (AP)

AP - Traffic noise could be ruining the sex lives of urban frogs by drowning out the seductive croaks of amorous males, an Australian researcher said Friday.

Frogs Find Home in Elephant Dung (LiveScience.com)

LiveScience.com - They may not be the best-smelling homes, but Asian elephant dung piles provide certain frog species with shelter, one researcher has found.

Evidence of endangered frog group found in Calif. (AP)

AP - Scientists have found evidence of a potentially large population of the nearly extinct mountain yellow-legged frog in a Southern California wilderness where it hadn't been seen in a half-century, raising prospects for restoring the species to its once wide range.

Football media pick TCU to win Mountain West (AP)

AP - TCU football coach Gary Patterson said Tuesday he was happy that college football media picked his Horned Frogs as the preseason favorite to win the 2009 Mountain West Conference.

Dolly's Creator Moves Away from Cloning and Embryonic Stem Cells

Sitting by the window of a posh coastal hotel in Half Moon Bay, Calif., wearing a baby-blue sweater and khakis, Ian Wilmut doesn’t project the image of a scientist who pulled off one of the most dramatic experiments in modern biology. When he and his collaborators unveiled Dolly the cloned sheep in 1997, they ignited the embryonic stem cell research field, struck awe in the public and set off a panic about the imminent cloning of humans. “Dolly was a big surprise to everyone,” recalls stem cell biologist Thomas Zwaka of the Center for Cell and Gene Therapy at the Baylor College of Medicine. Cloned frogs had refused to grow past the tadpole stage, and a seeming success in mice had proved to be a fake. According to scientific consensus back then, cloning adult mammals by the method Wilmut used was biologically impossible.As Dolly matured, the cloning technology that created her--called somatic cell nuclear transfer (SCNT)--grew into a rich research enterprise. Scientists hoped to eventually be able to take a patient’s cell, place its nucleus into an unfertilized human egg and then harvest embryonic stem cells to treat intractable conditions such as Parkinson’s disease. But the first human clinical trial continues to seem remote, with embryonic cloning constrained by a federal funding ban, deeply controversial ethical issues and technical challenges. In mid-May safety concerns led the U.S. Food and Drug Administration to put on hold a bid by Geron Corporation in Menlo Park, Calif., to conduct trials on patients who have acute spinal cord injury.