News tagged with size
Microcephaly genes associated with human brain size
Dec 21, 2009 |
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A group of Norwegian and American researchers have shown that common variations in genes associated with microcephaly - a neuro-developmental disorder in which brain size is dramatically reduced - may explain differences ...
Bigger not necessarily better, when it comes to brains
Nov 17, 2009 |
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(PhysOrg.com) -- Tiny insects could be as intelligent as much bigger animals, despite only having a brain the size of a pinhead, say scientists at Queen Mary, University of London.
Research backs theory on autism, schizophrenia
Nov 30, 2009 |
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(PhysOrg.com) -- New research by Simon Fraser University evolutionary biologist Bernard Crespi reinforces his theory that autism and schizophrenia are diametric or opposite conditions based on genes.
Abundance of a look-alike species clouds population status of a million dollar fish
Dec 10, 2009 |
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The prized white marlin, sought by anglers in million dollar prize tournaments and captured incidentally in commercial fisheries, is among the most overfished marine species under international management and the subject ...
Physicists Show that Correlated Environmental Variations Can Quicken Extinctions
Jan 13, 2009 |
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(PhysOrg.com) -- In general, population extinction is a natural process. For one reason or another, an estimated 99.9% of all species that have lived on Earth are now extinct. However, the reasons for a species ...
Buried Coins Key to Roman Population Mystery?
Oct 05, 2009 |
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(PhysOrg.com) -- The first century BC in Italy was culturally a brilliant age, unequaled by any other period in Roman history. It was a time of Cicero, Caesar, Vergil, Horace and many other major literary ...
Study finds human population expanded during late Stone Age
Jul 29, 2009 |
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Genetic evidence is revealing that human populations began to expand in size in Africa during the Late Stone Age approximately 40,000 years ago. A research team led by Michael F. Hammer (Arizona Research Laboratory's Division ...
Rresearchers achieves major step toward faster chips
Nanotechnology / Nanomaterials
May 07, 2009 |
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New research findings could lead to faster, smaller and more versatile computer chips. A team of scientists and engineers from Stanford, the University of Florida and Lawrence Livermore National Laboratory is the first to ...
Trading carats for nanometers - and defective diamonds for crystal clear microscopy
Mar 02, 2009 |
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(PhysOrg.com) -- Large, perfect diamonds are precious to almost all of us but to some scientists, it is the defects that really matter. This is because defects can form nanoscopic color centers, which play ...
Climate change and the mystery of the shrinking sheep
Jul 02, 2009 |
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(PhysOrg.com) -- Milder winters are causing Scotland's wild breed of Soay sheep to get smaller, despite the evolutionary benefits of possessing a large body, according to new research due to be published in ...
Why certain fishes went extinct 65 million years ago
Mar 26, 2009 |
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Large size and a fast bite spelled doom for bony fishes during the last mass extinction 65 million years ago, according to a new study to be published March 31, 2009, in the Proceedings of the National Ac ...
New analysis shows 'hobbits' couldn't hustle
Other Sciences / Archaeology & Fossils
May 06, 2009 |
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A detailed analysis of the feet of Homo floresiensis—the miniature hominins who lived on a remote island in eastern Indonesia until 18,000 years ago -- may help settle a question hotly debated among paleontologists: how si ...
Multiple genes implicated in autism
Feb 09, 2009 |
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(PhysOrg.com) -- By pinpointing two genes that cause autism-like symptoms in mice, researchers at MIT’s Picower Institute for Learning and Memory have shown for the first time that multiple, interacting genetic risk factors ...
Life got bigger in two, million-fold leaps, scientists say
Space & Earth / Earth Sciences
Dec 22, 2008 |
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(PhysOrg.com) -- Extremes are exciting. Does anyone really think dinosaurs would capture our imagination the way they do if they hadn't been so huge? You don't see natural history museums vying for fossil skeletons ...
Dinosaurs May Have Been Smaller Than We Thought: New Study
Other Sciences / Archaeology & Fossils
Jun 25, 2009 |
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(PhysOrg.com) -- For millions of years, dinosaurs have been considered the largest creatures ever to walk on land. While they still maintain this status, a new study suggests that some dinosaurs may actually have weighed ...
