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Amazing Facts

Simplest Microbes More Complex than Thought
December 29, 2009
The smallest, simplest cells are prokaryotes.  These are the bacteria and archaea that lack a nucleus and are usually considered primitive.  Scientists are finding, though, that they know many of the same tricks as the more complex nucleus-bearing eukaryotes.     PhysOrg reported that a species of Mycoplasma, among the smallest independent-living bacteria, is more […]
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Amazing Facts

Microscopy’s Golden Age Is At Hand
December 6, 2009
Like test pilots breaking the sound barrier, microscope makers are breaking a light barrier some said was physically impossible: the diffraction limit.  Within the next 5 to 10 years, we may see more and more images of phenomena at the molecular scale – not with electron microscopes, but with light microscopes in real time.  What […]
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Amazing Facts

Gap Between Origin-of-Life Research and Simplest Life Grows
November 27, 2009
Evolutionists are celebrating experiments that allegedly showed RNA chains can assemble in water – given nucleotides to start with (see Science Daily).  The suggestive steps over the gap from nonlife to life should be tempered with other discoveries that life is anything but simple.     New Scientist reported today that a “‘Simple’ bacterium shows […]
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Amazing Facts

To Advance Science, Imitate Nature
November 1, 2009
Biomimetics – the imitation of nature – continues to be one of the hottest areas in science.  Here are a few of the latest findings coming from the world of living creatures. Fish robot:  National Geographic News shows a photo of the latest thing in underwater robotics: a robotic submarine modeled after the Amazonian knifefish.  […]
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Amazing Facts

DNA Organization Is Fractal
October 13, 2009
How would you pack spaghetti in a basketball (07/28/2004) such that you could get to any strand quickly?  You might try the “fractal globule” method.  You form little knots, or globules, on each strand.  These become like beads on a string.  Now you fold the beads into globules, and then fold those into higher-level globules.  […]
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Amazing Facts

Chemistry Nobel Celebrates Cell Complexity
October 10, 2009
A discovery rivalling the elucidation of the genetic code is the structure of the ribosome – the “molecular machine” that translates the DNA code into proteins.  Untangling the complexity of this multi-part system won three scientists the Nobel Prize for Chemistry (see BBC News).  The winners are Venkatraman Ramakrishnan, Thomas Steitz and Ada Yonath.   […]
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Amazing Facts

Molecular Machines on Parade
September 3, 2009
Scientific papers continue to exhibit the exquisite mechanisms in the cell for handling all kinds of situations, through the operation of molecular machines.  Here are a few recent examples from this week’s issue of Nature (Sept 3, 2009). Molecular sieve:  What happens when a cell gets bloated?  Too much water entering a cell can increase […]
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Amazing Facts

Your Throat Has Tasteful Antennae
August 30, 2009
Our airways are lined with cells that have beating oars called motile cilia.  Like galley slaves on a Roman ship, they beat in coordinated waves, setting up currents that propel dust and foreign matter out toward the mouth.  Scientists just found out another amazing capability of these motile cilia: they can “taste” toxic chemicals and […]
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Amazing Facts

Plants Use Hourglass Mechanism
August 26, 2009
Plants need to know when to flower and produce seed.  They can read the sunshine, but what about plants living in shade or cloudy conditions?  It turns out they have two mechanisms for telling time: a light meter and an hourglass.  If the light meter doesn’t switch on, the hourglass lets the plant know it […]
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Amazing Facts

DNA Translator More Complicated Than Thought
August 24, 2009
One of the most remarkable molecular machines in your body, the ribosome, is coming to light, nanometer by nanometer, as scientists find new ways to peer into the inner workings of the “black box.”     Science Daily reported on work at Berkeley that has given the clearest imagery yet.  “Ribosomes, which number in the […]
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Amazing Facts

Protein Function: It’s All in the Fold
August 11, 2009
Most chemical reactions involve atoms or molecules bumping into one another and exchanging electrons.  Proteins, by contrast, derive their immense functional repertoire from their shapes.  Several recent studies explore the amazing potential for strength, motility and catalysis that derives from the way proteins fold. Clots:  A picture of fibrin graces an article in Science Daily.  […]
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Cell Biology

Did Evolution Create Genetic Proofreading?
August 9, 2009
Protein manufacture in the cell is such a critical operation, there are numerous error-checking mechanisms the cell uses to get it right.  One of the most amazing is the careful association of DNA codons with amino acids, and the “proofreading” or “spell checking” that ensures fidelity.  How could spell checking evolve?     Science Daily […]
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Biomimetics

Nanotech Blurs Line With Biophysics
July 24, 2009
Machines on the molecular scale – in the literature these days, one needs to dig to find whether a news article is talking about man-made machinery or the living cell.  Both employ laws of physics to do work.  Notice how seamless the connection is in the following examples. Kinesin tightrope walk:  Scientists at Northwestern University […]
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Cell Biology

Biological Big Bang: Another Explosion at the Dawn of Life
July 23, 2009
Eugene Koonin and two friends from the NIH went tree-hunting.  They examined almost 7,000 genomes of prokaryotes.  They found trees all right – a whole forest of them.  They even found 102 NUTs (nearly universal trees) in the forest.  Unfortunately, it’s not what they wanted to find: a single universal tree of life that Darwin’s […]
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Cell Biology

More Going On in the Brain Than We Realize
July 22, 2009
The news story about a girl who can see in both eyes with half a brain has stunned neurophysiologists (see New Scientist and Live Science).  Somehow, the remaining parts of her brain underwent a massive reorganization of the circuits involved in vision.  “It was quite a surprise to see that something like this is possible,” […]
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