New research led by a University of Calgary geophysicist provides strong evidence against continent formation above a hot mantle plume, similar to an environment that presently exists beneath the Hawaiian Islands. The analysis, published this month in Nature Geoscience, indicates that the nuclei of Earth’s continents formed as a byproduct of mountain-building processes, by stacking […]
Posts Tagged ‘Russel T Sajeev’
Birth of Earth’s Continents: New Research Points to Crust Stacking, Rather Than Upwelling of Hot Material
September 19th, 2013 
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‘Highway from Hell’ Fueled Costa Rican Volcano
September 18th, 2013 Riffin If some volcanoes operate on geologic timescales, Costa Rica’s Irazú had something of a short fuse. In a new study in the journal Nature, scientists suggest that the 1960s eruption of Costa Rica’s largest stratovolcano was triggered by magma rising from the mantle over a few short months, rather than thousands of years or more, […]
Extreme Life Forms: Life Found in the Sediments of an Antarctic Subglacial Lake for the First Time
September 17th, 2013 Riffin Evidence of diverse life forms dating back nearly a hundred thousand years has been found in subglacial lake sediments by a group of British scientists. The possibility that extreme life forms might exist in the cold and dark lakes hidden kilometres beneath the Antarctic ice sheet has fascinated scientists for decades. However, direct sampling of […]
Biochemists Resurrect ‘Molecular Fossils’: Findings Challenge Assumptions About Origins of Life
September 16th, 2013 Riffin Before there was life on Earth, there were molecules. A primordial soup. At some point a few specialized molecules began replicating. This self-replication, scientists agree, kick-started a biochemical process that would lead to the first organisms. But exactly how that happened — how those molecules began replicating — has been one of science’s enduring mysteries. […]
Ancient Ancestor of Tulip Tree Line Identified
September 15th, 2013 Riffin The modern-day tulip tree, state tree of Indiana as well as Kentucky and Tennessee, can trace its lineage back to the time of the dinosaurs, according to newly published research by an Indiana University paleobotanist and a Russian botanist. The tulip tree, Liriodendron tulipfera, has been considered part of the magnolia family. But David Dilcher […]
Darwin’s Dilemma Resolved: Evolution’s ‘Big Bang’ Explained by Five Times Faster Rates of Evolution
September 14th, 2013 Riffin A new study led by Adelaide researchers has estimated, for the first time, the rates of evolution during the “Cambrian explosion” when most modern animal groups appeared between 540 and 520 million years ago. The findings, published online today in the journal Current Biology, resolve “Darwin’s dilemma”: the sudden appearance of a plethora of modern […]
The Final Nail in the Jurassic Park Coffin? Next Generation Sequencing Reveals Absence of DNA in Sub-Fossilized Insects
September 13th, 2013 Riffin It is hardly possible to talk about fossil insects in amber without the 1993 movie Jurassic Park entering the debate. The idea of recreating dinosaurs by extracting DNA from insects in amber has held the fascination of the public for two decades. Claims for successful extraction of DNA from amber up to 130 million-years-old by […]
How Ancient Crocodiles Flourished During the Age of the Dinosaurs?
September 11th, 2013 Riffin New research has revealed the hidden past of crocodiles, showing for the first time how these fierce reptiles evolved and survived in a dinosaur dominated world. While most modern crocodiles live in freshwater habitats and feed on mammals and fish, their ancient relatives were extremely diverse — with some built for running around like dogs […]
Beneath Earth’s Surface, Scientists Find Long ‘Fingers’ of Heat
September 9th, 2013 Riffin Scientists seeking to understand the forces at work beneath the surface of Earth have used seismic waves to detect previously unknown “fingers” of heat, some of them thousands of miles long, in Earth’s upper mantle. Their discovery, published Sept. 5 in Science Express, helps explain the “hotspot volcanoes” that give birth to island chains such […]
Rare Fossil Ape Cranium Discovered in China
September 8th, 2013 Riffin A team of researchers has discovered the cranium of a fossil ape from Shuitangba, a Miocene site in Yunnan Province, China. The juvenile cranium of the fossil ape Lufengpithecus is significant, according to team member Nina Jablonski, Distinguished Professor of Anthropology at Penn State. Jablonski noted that juvenile crania of apes and hominins are extremely […]
