Tag Archives: evolution

Tiny “Spherules” Record Precise Information About Asteroid Impacts on Earth

May 15, 2012

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Tiny 'spherules' reveal details about Earth's asteroid impacts

A new method for extracting precise information from tiny “spherules” embedded in layers of rock has allowed researchers to record precise information about asteroids impacting Earth from 3.5 billion to 35 million years ago. West Lafayette, Indiana – Researchers are learning details about asteroid impacts going back to the Earth’s early history by using a [...]

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Evolutionary Changes Surrounding the NOS1 Gene

May 11, 2012

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Evolution’s gift may also be at the root of a form of autism

A new study from neurobiologists at Yale University examines the evolutionary changes surrounding the NOS1 gene and suggests that the same evolutionary mechanisms that may have gifted our species with amazing cognitive abilities may have also made us more susceptible to disorders such as autism. A recently evolved pattern of gene activity in the language [...]

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Blond Hair of Melanesians Evolved Differently Than Those of Europeans

May 7, 2012

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blond-pacific-islander-girl

A new study of the people from the Solomon Islands in Melanesia, a group of islands northeast of Australia, has shown that blond hair evolved differently, genetically speaking, than in Europeans. About 5-10% of the people in Melanesia have naturally blond hair, which is the highest prevalence outside of Europe. This refutes the hypothesis that [...]

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Evolutionary History of Cypress Tree Reflects the Breakup of Pangaea

May 3, 2012

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Cypress distribution reflects the breakup of Pangaea

New research from biologists at Ludwig Maximilian University of Munich examines the evolutionary history of the cypress tree, finding that their origins can be traced back to the break-up of Pangea about 153 million years ago. In classical mythology, the cypress tree is associated with death, the underworld and eternity. Indeed, the family to which [...]

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Human Evolution Still Tied to Darwinian Selection

May 1, 2012

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Darwinian selection influences human evolution

As it turns out, even with all our medical technology and health education, we can’t outrun the findings of Charles Darwin. A study conducted by an international collaboration of scientists shows that humans are continuing to evolve just like other species in the wild. New evidence proves humans are continuing to evolve and that significant [...]

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Examining the Genes of Stone Age Farmers

April 30, 2012

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genetic variation of today’s Europeans was strongly affected by immigrant Stone Age farmers

New findings from a team of Swedish-Danish evolutionary biologists show that the genetic variation of today’s Europeans was strongly affected by immigrant Stone Age farmers. The study involved comparisons of thousands of genetic markers from four Stone Age skeletons to genetic data from living individuals. One of the most debated developments in human history is [...]

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Marine Worm Thrives on Steady Diet of Deadly Poisons

April 23, 2012

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If you thought living on fast-food, candy, soda and red meat was dangerous, try a diet of carbon monoxide and hydrogen sulfide. That’s what researchers at the Max Planck Institute found to be the diet of a small marine worm, Olavius algarvensis, which is thriving on these poisons in the seas off the coast of [...]

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Million-Year-Old Ash in South African Cave Yields Evidence of Cooking

April 4, 2012

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wonderwerk-cave-south-africa

Ash was discovered in a South African cave, and this indicates that humans were cooking with fire one million years ago. This is the earliest use of fire but experts say that more proof is needed to conclude that humans were cooking with fire regularly. Francesco Berna, an archaeologist, at Boston University in Massachusetts, and [...]

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Stickleback Fish Used Pre-Existing Genes to Go from Saltwater to Freshwater Environments

April 4, 2012

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nine-spined-stickleback

New research pinpoints to certain mutations that may have helped the stickleback, a tiny armored fish, to evolve quickly between saltwater and freshwater forms. Since the end of the last ice age, about 10,000 years ago, the ocean-dwelling three-spined sticklebacks (Gasterosteus aculeatus) have repeatedly colonized freshwater streams and lakes. In the last ten generations, marine [...]

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Relationships of Male Dolphins from Shark Bay Determined by Slow Swimming

April 2, 2012

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shark-bay-slow-swimming-dolphins

In Shark Bay, Australia, the male dolphins are well known to marine biologists for their messy social entanglements. These relationships are so unique, that they’re more like intricate webs of the way that the Cosa Nostra and the Mafia work than the typically vertical hierarchies of chimpanzees. A team of scientists argues in a recent [...]

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Similarities Between Acorn Worm and Vertebrate Brain

March 16, 2012

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adult acorn worm

A new study shows that Saccoglossus kowalevskii, a sea dwelling, bottom-feeding acorn worm, has a similarities to humans although the worms are separated from vertebrates by over 500 million years of evolution. Biologists may need to rethink where to look for evolutionary changes responsible for the origin of vertebrates, including humans, as a result of [...]

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Jawless Vertebrate Conodont Had Sharpest Yet Minuscule Teeth

March 14, 2012

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conodont-fossil-teeth

The conodont, an extinct primitive marine vertebrate, had the sharpest teeth ever known, with tips just one-twentieth of the width of a human hair, and was able to apply pressures that were comparable with the ones made with human jaws. Conodonts had these razor-sharp teeth and they were jawless vertebrates that evolved 500 million years [...]

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