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Cell Biology

Bacteria Too Complex To Be Primitive Eukaryote Ancestors
July 12, 2010
In the search for the most primitive life forms on earth, bacteria would certainly make the list.  They are tiny, one-celled, and have small genomes.  Why, then, did Patrick Forterre and Simonetta Gribaldo of the Pasteur Institute say in PNAS,1 “we should definitely stop thinking of bacteria in terms of simple ‘lower’ organisms”?  For the […]
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Amazing Facts

Proteins Fold Who Knows How
July 9, 2010
One of the biggest mysteries remaining in cell biology is how proteins fold.  Proteins start out as chains of amino acids (polypeptides) as they exit the ribosome.  Most of them spontaneously fold into their “native” three-dimensional structures, where they will go to work as enzymes, structural materials or other key players in cell life.  About […]
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Amazing Facts

Your Inner Locomotive Revealed
July 6, 2010
Visualize an old locomotive train roaring down the tracks.  One of the characteristic images that surely comes to mind is the oscillating motion of the coupling rods on the wheels.  The long rods that connected the wheels provided a way to convert heat energy from the steam into mechanical energy (example video on YouTube).  It […]
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Cell Biology

Heal the Blind with Stem Cells
June 30, 2010
Have you heard that some cases of corneal blindness can be cured by stem cells #– from the person’s own eyes?  New Scientist recounted some recent successes for victims blinded in one eye by burns or acid.  Stem cells taken from the limbus, a disk surrounding the iris, and transplanted onto the damaged cornea, were […]
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Amazing Facts

Farm Algae for Energy
June 29, 2010
June 29, 2010 — Why manufacture fuels when microbes can do it faster, better and cheaper?  Researchers at the University of Cambridge are wiring electrodes to algae to produce “green energy” – solar-powered fuel that is carbon-neutral, “cheaper to produce, self-repairing, self-replicating, biodegradable and much more sustainable – real green energy.”     The team […]
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Amazing Facts

Flagellum Replaces Parts on the Fly
June 12, 2010
A new study appears to show that the bacterial flagellum, a molecular rotary motor that has become iconic of the intelligent design movement, can repair parts of its rotor while it is rotating.  The results of the study by Oxford University were published in PNAS,1 and were also the focus of a Commentary in PNAS […]
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Amazing Facts

Your Nerves and Heart Depend on Cellular Pulleys, Latches and Switches
June 4, 2010
Biologists continue to peer closer and closer at cellular machines that work just like man-made ones, only at scales so tiny, they control individual atoms.  Of particular interest have been the gates in the membranes of cells that allow certain atoms in but keep others out.  A recent paper in Cell by an Australian team […]
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Amazing Facts

Venter’s Synthetic Plagiarism Deflated by NY Times
June 2, 2010
How significant was Craig Venter’s achievement of a so-called synthetic genome?  Somewhat significant, but it pales in significance to creating life from scratch.  It was only like “peering over a fortress that is the mighty cell,” wrote Natalie Angier for the New York Times Monday, May 31.     The article was accompanied with a […]
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Cell Biology

Stem Cells: Hope, Politics, Charity, and Clarity
May 30, 2010
Those promising little cells that can differentiate into almost any tissue continue to make news – but they also continue to generate controversy.  Actually, only some of them generate controversy: the embryonic stem cells.  Not all of the articles about stem cells make that clear.  Defining life:  With the stroke of a pen, South Korea […]
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Biomimetics

Venter Group Plagiarizes Genetic Code
May 22, 2010
Is plagiarism a form of intelligent design?  We think of intelligent design in terms of God and creation, but in generic terms, I.D. only refers to purposeful, designed action by an agent – any agent, large or small, good or evil.  A planned murder, for instance, can be an evil form of intelligent design.  A […]
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Biomimetics

If Humans Build DNA Machines, Is It Intelligent Design?
May 15, 2010
Two teams have succeeded in building little robots that work on DNA tracks.  These resemble in many respects the machines that cells use to perform its functions on DNA.  No one denies that humans engineered their nanobots on purpose, but Darwinist scientists claim natural cellular machines evolved without purpose or design.  What’s the difference?   […]
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Amazing Facts

Bacteria: Let’s Harness Those “Perfect Machines”
May 11, 2010
Ten Italian scientists have a novel idea.  They want to hitch up their wagons to bacteria and use them to power nanomachines.  It’s too much work to build such “perfect machines” from scratch, they said.  Why not just take advantage of what nature has already provided?     Their paper in PNAS1 is downright dreamy […]
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Human Body

Can Darwin Be Rescued from a New Eye Discovery?
May 7, 2010
Scientists find waveguides and noise receptors built into the retina.
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Cell Biology

Darwin’s Linux: Did Evolution Produce a Computer?
May 4, 2010
How is a cell like a computer?  Some Yale scientists asked that question, and embarked on a project to compare the genome of a lowly bacterium to a computer’s operating system.1.  Their work was published in PNAS.2  As with most analogies, some things were found to be similar, and some different – but in the […]
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Amazing Facts

Update on Interplant Internet
April 23, 2010
One of the early “amazing” stories reported in these pages concerned the startling observation that plants use a kind of “email” system in their own interplant “internet” (see 07/13/2001).  What has been learned in the nine years since that story appeared?  Quite a lot, and another fascinating article about plant communication appeared this week in […]
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