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| Biology articles |
Ultra-fast camera captures how hummingbirds hover
Hummingbirds are masters of the air--unique among birds for their ability to hover for long periods of time. Using a sophisticated digital imaging technique, scientists have now determined the aerodynamics of hummingbird flight. These latest data disprove conclusions from numerous earlier studies that hummingbirds hovered like insects despite their profound muscle and skeletal differences.
Scientists crack 40-year-old DNA puzzle
A new theory that explains why the language of our genes is more complex than it needs to be also suggests that the primordial soup where life began on earth was hot and not cold, as many scientists believe.
Alligator egg development at prehistoric oxygen levels
The development of bone structures in alligator eggs raised under varying oxygen concentrations creates a link to fossil records of the evolution of vertebrates and prehistoric atmospheric oxygen concentrations, according to a paper to be presented at the Earth System Processes 2 meeting in Alberta, Canada.
Biologist discovers what may be the world's 'pickiest' mates
California fiddler crabs may be among the world's pickiest animal when it comes to selecting a mate.
Researchers use human embryonic stem cells to kill cancer cells
For the first time, stem cell researchers at the University of Minnesota have coaxed human embryonic stem cells to create cancer-killing cells in the laboratory, paving the way for future treatments for various types of cancers (or tumors). The research will be published in the Oct. 15 issue of the Journal of Immunology.
New class of antibiotics
A peptide identified in a fungus found in northern European pine forests possesses as much power as penicillin as well as vancomycin, according to an international team of researchers.
Researchers find a potential key to human immune suppression in space
Researchers at the San Francisco VA Medical Center have identified a set of key immune-response genes that do not turn on in a weightless environment. The discovery is another clue in the effort to solve an almost 40-year-old mystery: why the human immune system does not function well in the weightlessness of space.
Cells with duplicate genomes can trigger tumors
Abnormal cell division that yields cells with an extra set of chromosomes can initiate the development of tumors in mice, researchers at Dana-Farber Cancer Institute have shown, validating a controversial theory about cancer causation put forth by a scientific visionary nearly 100 years ago.
'Smart' bio-nanotubes developed
Materials scientists working with biologists at the University of California, Santa Barbara have developed "smart" bio-nanotubes — with open or closed ends — that could be developed for drug or gene delivery applications
'Smart' bio-nanotubes developed
Materials scientists working with biologists at the University of California, Santa Barbara have developed "smart" bio-nanotubes — with open or closed ends — that could be developed for drug or gene delivery applications
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Traces evolution of extinct sabertooths and the American cheetah-like cat
By performing sequence analysis of ancient DNA, a team of researchers has obtained data that help clarify our view of the evolutionary relationships shared by the large predatory cats that once roamed the prehistoric New World
How the brain understands pictures?
The figure is famous: a deceptively simple line drawing that at first glance resembles a vase and, at the next, a pair of human faces in profile. When you look at this figure, your brain must rapidly decide what the various lines denote. Are they the outlines of the vase or the borders of two faces? How does your brain decide?
Finished rice genome
Every year, the world consumes over 880 billion pounds of rice, which feeds half the population. Those tiny grains add up. So maybe it's no surprise that this important food crop turns out to have more genes than humans
Nitrogen in the air feeds the oceans
A USC oceanographer's long-term study shows that the marine food chain depends in large part on atmospheric nitrogen. The finding also demonstrates the oceans' massive absorption of greenhouse gas
Molecular mechanism of feather formation found
Feathers are the essence of birds. Without them, birds could not fly or attract mates. But how exactly do feathers form molecularly? Experimentally testing one current hypothesis, developmental biologists at University of Wisconsin Medical School believe they now have the answer
New perspective on embryo formation
How does a multi-cellular organism with specialized organs and tissues develop from a single cell? A team of genomics researchers has moved closer to answering this question by creating the first comprehensive diagram of the molecular interactions that orchestrate early embryo development
Locust' built in surface analysis' hability directs them to fly overland
Swarms of millions of locusts have, since Biblical times and until our very own day, been considered a "plague" of major proportions, with the creatures destroying every growing thing in their path
Gene loss accelerates aging
Researchers have discovered that the loss of a gene called p63 accelerates aging in mice. Similar versions of the gene are present in many organisms, including humans. Therefore, the p63 gene is likely to play a fundamental biological role in aging-related processes.
Researchers propose rewilding
If Cornell University researchers and their colleagues have their way, cheetahs, lions, elephants, camels and other large wild animals may soon roam parts of North America.
Researchers discover model organism for studying viruses that affect humans
Researchers at the University of California, Riverside have discovered that a simple worm, called C. elegans, makes an excellent experimental host for studying some of the most virulent viruses that infect humans.
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| Quotes | By convention!
cussed Tom airily.
Cmon Scully... Itll be a nice trip through the woods-Fox Mulder
But what ... is it good for?
Engineer at IBM, 1968, commenting on the microchip.
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