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| May 09, 2008 |
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Did The Solar System Bounce And Kill Off The Dinosaurs Cardiff, Scotland (SPX) May 05, 2008 
The sun's movement through the Milky Way regularly sends comets hurtling into the inner solar system - coinciding with mass life extinctions on earth, a new study claims. Scientists at the Cardiff Centre for Astrobiology built a computer model of our solar system's movement and found that it "bounces" up and down through the plane of the galaxy. As we pass through the densest part of the ... read more |
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FSU Geochemist Challenges Key Theory Regarding Earth's Formation
Tallahassee FL (SPX) May 02, 2008Working with colleagues from NASA, a Florida State University researcher has published a paper that calls into question three decades of conventional wisdom regarding some of the physical processes that helped shape the Earth as we know it today. Munir Humayun, an associate professor in FSU's Department of Geological Sciences and a researcher at the National High Magnetic Field Laboratory ... more Key Component Of Earth Crust Formed From Moving Molten Rock 
Ithica NY (SPX) Mar 07, 2008Earth scientists are in the business of backing into history -- extrapolating what happened millions of years ago based on what they can observe now. Using this method, a team of Cornell researchers has created a mathematical computer model of the formation of granulite, a fine-grained metamorphic rock, in the Earth's crust. By studying what were once pockets of hot, melted rock 13 kilomet ... more Tiny Pieces Of Deep Time Brought To The Surface 
London ON (SPX) Mar 04, 2008Three-billion-year-old zircon microcrystals found in northern Ontario are proving to be a new record of the processes that form continents and their natural resources, including gold and diamonds. The discovery was made recently by an international research team led by Earth Sciences professor Desmond Moser at The University of Western Ontario. Measuring no more than the width of a human ... more The Iceland Diaries 
Moffett Field (SPX) Feb 12, 2008In June 2007, Prof. Charles Cockell, Dr. Aude Herrera, Joseph Deeks from the Geomicrobiology Research Group at the Open University and Prof. Stephen Self from the Volcano Dynamics Group at the Open University left England to spend one week in Landmannalaugar, a region near the volcano Hekla in the Southern Highlands of Iceland. Their goal was to collect volcanic rock samples in order to ... more Scientists Rebuild Ancient Proteins To Reveal Primordial Earth's Temperature 
Gainesville FL (SPX) Feb 08, 2008Using the genetic equivalent of an ancient thermometer, a team of scientists has determined that the Earth endured a massive cooling period between 500 million and 3.5 billion years ago. Reporting in the journal Nature, researchers from the University of Florida, the Foundation for Applied Molecular Evolution and the biotechnology company DNA2.0 describe how they reconstructed proteins from ... more |
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Houston TX (SPX) Nov 22, 2007A team of scientists from NASA's Johnson Space Center (JSC) and the Lunar and Planetary Institute (LPI), both in Houston, and the University of California, Davis (UCD) has found that terrestrial planets such as the Earth and Mars may have remained molten in their early histories for tens of millions of years. The findings indicate that the two planets cooled slower than scientists thought and a ... more Building Life On Earth 
Athens GA (SPX) Nov 05, 2007How did chemical constituents essential to life arise on primitive Earth? A University of Georgia team suggests a new answer. Experiments show that simple molecules can combine chemically rather than biologically to form the building blocks of DNA, the key component of all life forms. These processes might have taken place on primitive earth, but how they occur is an unsolved puzzle. ... more How Did Chemical Constituents Essential To Life Arise On Primitive Earth 
Atlanta GA (SPX) Oct 31, 2007Experiments show that simple molecules can combine chemically rather than biologically to form the building blocks of DNA, the key component of all life forms. These processes might have taken place on primitive earth, but how they occur is an unsolved puzzle. Chemists at the University of Georgia have now proposed the first detailed, feasible mechanism to explain how adenine, one of the f ... more Climate change: Fossil record points to future mass extinctions 
Paris (AFP) Oct 24, 2007Global warming could cut a swathe through the planet's species over the coming centuries, warns a study released Wednesday that shows a link between rising temperatures and mass extinctions reaching back half a billion years. Each of five major eras of declining biodiversity -- including one in which 95 percent of the Earth's species disappeared -- correspond to cycles of severe warming over ... more Greenhouse Earth: Methane powered runaway global warming 
Paris (AFP) Sept 19, 2007Methane released from wetlands turned the Earth into a hothouse 55 million years ago, according to research released Wednesday that could shed light on a worrying aspect of today's climate-change crisis. Scientists have long sought to understand the triggers for an extraordinary warming episode called the Palaeocene-Eocene Thermal Maximum (PETM), which occurred about 10 million years after t ... more |
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New Brunswick, NJ (SPX) Aug 08, 2007The DNA of ancient microorganisms, long frozen in glaciers, may return to life as the glaciers melt, according to a paper published online this week in the Proceedings of the National Academy of Sciences by scientists at Rutgers, The State University of New Jersey, and Boston University. The article is scheduled to appear in the print edition on Tuesday, Aug. 14. The finding is significan ... more Crystals On Meteorite Reveal Clues To Early Solar System Evolution 
Toronto, Ontario (SPX) Aug 07, 2007A University of Toronto-led study has uncovered tiny zircon crystals in a meteorite originating from Vesta (a large asteroid between Mars and Jupiter) shedding light on the formation of planetesimals, small astronomical objects that form the basis of planets. To date, studying zircons in eucrites - meteorites formed by volcanic activity - has been difficult due to impact- induced fracturing and ... more Fossils Older Than Dinosaurs Reveal Pattern Of Early Animal Evolution On Earth 
Chicago IL (SPX) Jul 29, 2007The abundant diversity of characteristics within species likely helped fuel the proliferation and evolution of an odd-looking creature that emerged from an unprecedented explosion of life on Earth more than 500 million years ago. University of Chicago paleontologist Mark Webster reports this finding in the July 27 issue of the journal Science. "From an evolutionary perspective, the more variable ... more Rise Of Dinosaurs In Late Triassic More Gradual Than Once Thought 
Berkeley CA (SPX) Jul 20, 2007Fossils discovered in the oft-painted arroyos of northern New Mexico show for the first time that dinosaurs and their non-dinosaur ancestors lived side by side for tens of millions of years, disproving the notion that dinosaurs rapidly replaced their supposedly outmoded predecessors. The fossils were excavated from the Hayden Quarry at Ghost Ranch, an area made famous through the paintings of Ge ... more Inventing Protein 
Tucson AZ (SPX) Jul 10, 2007Nature, through the trial and error of evolution, has discovered a vast diversity of life from what can only presumed to have been a primordial pool of building blocks. Inspired by this success, a new Biodesign Institute research team, led by John Chaput, is now trying to mimic the process of Darwinian evolution in the laboratory by evolving new proteins from scratch. Using new tricks of molecul ... more
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