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Bony vertebrate evolution: Elephant sharks closer to humans than teleost fish
04-02-2007 · EurekAlert!The cartilaginous elephant shark has a basal phylogenetic position useful for understanding jawed vertebrate evolution. Survey sequencing of its genome identified four Hox clusters, suggesting that, unlike for teleost fishes, no additional whole-genome duplication has occurred.
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Keywords: bony, vertebrate, evolution, elephant, sharks, humans, teleost, fish, shark, human
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- Rhesus macaque genome may hold clues for human health and evolution
04-12-2007 · EurekAlert!
An international consortium of scientists has completed a draft sequence of the rhesus macaque genome, a species of non-human primate widely used for creating models of human diseases and infections. The study paves the way for researchers to watch disease progression at the genetic level in macaques, a close relative of humans. The findings, which appear April 13 in the journal Science, will let us learn how humans and other primates evolved into distinct species.
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- Food for Thought: New Estimates of the Shark-Fin Trade
11-04-2006 · Science News Online
A new study of the Asian fish market yields a disturbing estimate of how many sharks are killed each year to satisfy demand for a pricy Asian soup.
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- Genomics study provides insight into the evolution of unique human traits
07-30-2007 · EurekAlert!
Researchers report the results of a large-scale, genome-wide study to investigate gene copy number differences among ten primate species, including humans. In the report, the scientists speculate how unique, lineage-specific gene copy number expansions and contractions in humans may underlie traits such as endurance running, higher cognitive function, and susceptibility genetic disease.
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- Neuron cell stickiness may hold key to evolution of the human brain
11-02-2006 · EurekAlert!
The stickiness of human neurons may have been a key factor in why the human brain evolved beyond the brains of our primate relatives. In a study comparing the genomes of humans, chimpanzees and other vertebrates, researchers at the US Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab) and Joint Genome Institute (JGI) found a strikingly high degree of genetic differences in DNA sequences that appear to regulate genes involved in nerve cell adhesion molecules.
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- West Australian fossil find rewrites land mammal evolution
10-18-2006 · EurekAlert!
A fossil fish discovered in the West Australian Kimberley has been identified as the missing clue in vertebrate evolution, rewriting a century-old theory on how the first land animals evolved.
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- Are humans evolving faster?
12-10-2007 · EurekAlert!
University of Utah researchers discovered genetic evidence that human evolution is speeding up -- and has not halted or proceeded at a constant rate, as had been thought -- indicating that humans on different continents are becoming increasingly different.
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- Transparent fish to make human biology clearer
02-06-2008 · EurekAlert!
Zebrafish are genetically similar to humans and good models for human diseases. Now, researchers in Children's Hospital Boston's Stem Cell Program have bred a zebrafish that is transparent throughout its life, allowing researchers to directly view its internal organs and observe disease processes like tumor growth or engraftment of bone-marrow transplants in a living organism.
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- Genome study places modern humans in the evolutionary fast lane
12-10-2007 · EurekAlert!
Countering a common theory that human evolution has slowed to a crawl or even stopped in modern humans, a new study examining data from an international genomics project describes the past 40,000 years as a time of supercharged evolutionary change, driven by exponential population growth and cultural shifts.
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- Genetic variation: We're more different than we thought
11-22-2006 · EurekAlert!
New research shows that at least 10 percent of genes in the human population can vary in the number of copies of DNA sequences they contain -- a finding that alters current thinking that the DNA of any two humans is 99.9 percent similar in content and identity. This discovery of genetic variation is expected to change the way scientists think about genetic diseases and evolution.
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- Man's best friend lends insight into human evolution
03-01-2007 · EurekAlert!
Drawing inferences about the intentions of other individuals is a basic part of everyday life that we humans take for granted. But, according to a study in Current Directions in Psychological Science this ability is present in other species as well.
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