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Cell Biology

Shedding Light on the Protein Big Bang Theory
March 13, 2009
The precise three-dimensional structure of a typical protein molecule is so complex, its origin would seem hopeless by chance.  What if evolutionary biologists were to discover a whole host of proteins literally exploded into existence at the beginning of complex life?  We can find out what they would think by looking at an article on […]
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Genetics

More Functional Non-Coding DNA Found
March 12, 2009
Another finding undermines the concept of “junk DNA.”  A team of scientists in Massachusetts found over a thousand functional RNA transcripts from intergenic sequences.  These RNA transcripts, coming not from genes but from regions earlier thought to be non-functional, take part in diverse functions from stem cell pluripotency to HOX gene developmental processes to cell […]
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Cell Biology

Elect Obama, Get Embryonic Stem Cells
March 8, 2009
President Obama is about to fulfill of his campaign promises: lifting restrictions on creating new embryonic stem cell lines (see Fox News).  The question now is, are they really needed?  They have yet to show any successes, while adult stem cells are enjoying an accelerating boom of amazing discoveries that could provide hope for some […]
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Genetics

Darwin Had Genetic Blinders
March 4, 2009
Darwin was a contemporary of Mendel, so why did he get inheritance wrong?  That question was addressed on Science Daily by Jonathan Howard of the University of Cologne, Germany.  His thesis is that Darwin had philosophical blinders on that prevented him from recognizing the significance of evidence before him.     “Why Didn’t Darwin Discover […]
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Amazing Facts

Cell Motors Play Together
February 27, 2009
If one molecular machine by itself is a wonder, what would you think of groups of them playing in concert?  Recent papers and news articles are claiming that’s what happens in living cells: molecular motors coordinate their efforts.     Science Daily led off a story on this by saying, “Even within cells, the left […]
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Cell Biology

Adult Stem Cells, +2; Embryonic Stem Cells, -1
February 23, 2009
Two more successes were chalked up for adult stem cell therapies recently.  Science Daily said that sufferers from Crohn’s disease may have a new treatment option by getting injections of their own bone marrow stem cells.  This “now constitutes a treatment option to cure an intestinal disease that sometimes does not successfully respond to drugs […]
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Amazing Facts

Assassins Roam Our Highways
February 22, 2009
Slinking surreptitiously through our blood streams, the assassins prowl about, looking for their targets.  These are not terrorists or vigilantes.  They have a license to kill.  Be glad they are there; they have saved your life many times.  They are called natural killer cells.     PhysOrg reported on work going on at Howard Hughes […]
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Cell Biology

Disease Genes Play the Wrong Tune
February 18, 2009
How did disease originate?  It might seem that large changes in genes would be required to turn a benign cell into a pathogen, but an article on Science Daily says it might just be a good cell playing a bad tune.     Bacteria have more genes than they use at any one time.  What […]
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Early Man

Language Is Not a Simple Genetic Matter
February 18, 2009
It sounds so simple.  The title on an article in PhysOrg announced, in Kipling Just-So Story Format, “How gorilla gestures point to evolution of human language.”  Because gorillas have an extensive repertoire of over 100 gestures, human conversation was only a matter of evolutionary time.  Is this mere storytelling, or do such explanations have scientific […]
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Amazing Facts

Evolution as Efficiency Expert
February 6, 2009
Who would have thought that a lowly bacterium is a “master of industrial efficiency”?  That’s what a researcher at the Weizmann Institute of Science called it.  E. coli, the best-studied microbe, “can be thought of as a factory with just one product: itself,” a press release said.  “It exists to make copies of itself, and […]
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Early Man

What Mean These Observations?
February 5, 2009
Science news outlets report many interesting findings every week.  It’s not always clear, though, whether the conclusions drawn from them are warranted by the data.  Here are some recent cases: Jaws of steel:  A skull labeled Australopithecus robustus was studied for the force its jaws could generate.  Interpretation: “Early humans had jaws of steel.”  With […]
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Cell Biology

Obama and Stem Cells: Hope Chest or Pandora’s Box?
January 31, 2009
Any day now, as he promised, President Obama will likely lift funding restrictions on embryonic stem cell research imposed by former President Bush.  Bush had sought the council of leading scientists and ethicists before making his decision.  Obama, by contrast, will be yielding to the opinions of the scientific societies who have clamored for years […]
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Genetics

New Genetics Revolution Underway
January 27, 2009
The genetics of the 1950s was that DNA is the seat of all inheritance, and that genetic information traveled one way: from DNA to protein.  That “central dogma” has been changing after decades of further researchers.  Theories of epigenetics (inheritance not limited to DNA) have been gaining attention with increasing frequency.     Science Daily […]
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Amazing Facts

Biology Now Includes Fluid Dynamic Construction
January 13, 2009
There’s an old legend that Tibetan monks built a wall by levitating heavy stones with sound by beating their drums and gongs.  Something not quite so fantastic but still amazing is done by cells in the embryo.  Scientists have filmed zebrafish embryos using beating cilia to build little stone structures that they use for balance. […]
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Birds

Nature Struts Darwin Gems
January 2, 2009
Like a showcase of pearl-handled revolvers, an armory of evidences Nature calls “Darwin’s Gems” have been exhibited to warn creationists that Darwin Day will be defended next month with a show of force.  The authors, Henry Gee (former editor of Nature), Rory Howlett and Philip Campbell have made their 15 Evolutionary Gems freely available “and […]
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