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Latest Tiktaalik Stories

New Fish Fossil Reveals How Fins May Have Become Hind Limbs
2014-01-14 06:11:22

[ Watch the video: Tiktaalik roseae fossils reveal evolution of hind limbs ] April Flowers for redOrbit.com - Your Universe Online The evolution of hind legs actually began as enhanced hind fins, according to the newly discovered, well-preserved pelvis and a partial pelvic fin from Tiktaalik roseae—a 375 million-year old transitional species between fish and the first legged animals. The findings, published in Proceedings of the National Academy of Sciences (PNAS), challenge the...

Ancient Fossils Of Tough Fish Shed Light On Evolution Of Four-Footed Animals
2013-03-28 08:08:22

April Flowers for redOrbit.com - Your Universe Online Describing life in the Devonian period in what is now northern Canada, Dr. Ted Daeschler of Drexel University said, "We call it a 'fish-eat-fish world,' an ecosystem where you really needed to escape predation.” The famous fossil fish species Tiktaalik roseae lived in this environment 375 million years ago. Daeschler, associate professor at Drexel University in the Department of Biodiversity, Earth and Environmental Science,...

Image 1 - Researchers Find New Species Of Ancient Predatory Fish
2011-09-12 11:14:53

  The Academy of Natural Sciences today announced the discovery of a new species of large predatory fish that prowled ancient North American waterways during the Devonian Period, before backboned animals existed on land. Drs. Edward "Ted" Daeschler and Jason Downs of the Academy and colleagues from the University of Chicago and Harvard University describe the new denizen of the Devonian they named Laccognathus embryi in the current issue of the Journal of Vertebrate Paleontology....

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2010-01-07 06:50:00

Fossilized footprints of a mysterious, long-extinct creature in a Polish quarry have caused paleontologists to reconsider traditional thinking of how sea-based vertebrates moved to land. Until now, scientists have thought they understood the evolutionary transition from fin to foot fairly well. One of the key theories in evolutionary biology is that tetrapods, four-legged animals with a spine, came from fish that had pairs of lobed fins. Fish called elpistostegids were the intermediate stage...

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2009-03-24 07:45:00

The genetic toolkit that animals use to build fins and limbs is the same genetic toolkit that controls the development of part of the gill skeleton in sharks, according to research to be published in Proceedings of the National Academy of Sciences on March 23, 2009, by Andrew Gillis and Neil Shubin of the University of Chicago, and Randall Dahn of Mount Desert Island Biological Laboratory. "In fact, the skeleton of any appendage off the body of an animal is probably patterned by the...

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2008-10-16 12:45:00

Some 375 million years ago, a unique fish existed with features in its head that helped pave the way for vertebrate animals to live on land, scientists said on Wednesday. Now, new research is providing the first glimpse at the internal head skeleton of Tiktaalik roseae. The transition from aquatic to terrestrial lifestyle involved complex changes not only to appendages (fins to limbs) but also to the internal head skeleton, researchers report in the recent issue of the journal Nature....

2008-08-03 03:00:06

By Bell, Michael A PALEONTOLOGY Variations on a Theme YOUR INNER FISH: A Journey into the 3.5-Billion-Year History of the Human Body. Neil Shubin. x + 229 pp. Pantheon Books, 2008. $24. Ernst Haeckel's punchy three- word slogan "Ontogeny recapitulates phylogeny" has earned a certain immortality-never mind that it's wrong. Each species does not, as Haeckel claimed, retrace its evolutionary history as it develops, with human embryos going through fish and reptile stages. But that's not to say...

2008-06-26 09:00:00

Scientists believe the discovery of well-preserved fossils in Latvia may explain the evolutionary history of how our ancestors moved from water to land.  Swedish researchers have reconstructed parts of the animal, which had a fish-like body but a head that appears better suited to land than water. The four-legged fish, known as Ventastega curonica, would have looked similar to a small alligator, the scientists say, and may in part explain the process of evolution. Researchers Per...

2008-02-18 09:00:00

Even before they are born, all people carry genetic baggage, genes that were useful to distant, non-human ancestors but are hopelessly outdated, even harmful, to humans as they live today. Chicago scientist Neil Shubin calls this inheritance our "inner fish." People hiccup, he explains, because of a design malfunction in a nervous system and breathing apparatus passed down from fish and tadpoles. Human males are vulnerable to hernias because of their awkward setup for toting around...

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2006-04-05 12:05:00

LONDON -- Scientists have caught a fossil fish in the act of adapting toward a life on land, a discovery that sheds new light one of the greatest transformations in the history of animals. Scientists have long known that fish evolved into the first creatures on land with four legs and backbones more than 365 million years ago, but they've had precious little fossil evidence to document how it happened. The new find of several specimens looks more like a land-dweller than the few other fossil...


Word of the Day
barghest
  • A goblin in English folklore, often appearing in the shape of a large dog and believed to portend imminent death or misfortune.
  • A ghost, wraith, hobgoblin, elf, or spirit.
The origin of 'barghest' is not known, but it may be from perhaps burh-ghest, town-ghost, or German Berg-geist (mountain spirit) or Bär-geist (bear-spirit).
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