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Amazing Facts

This Tree of Life Is Real
March 9, 2010
Imagine a tree that can provide both nutritious food and clean water.  Moringa oleifera is such a tree.  It grows in Africa and Asia and is being looked at as a life-giving plant that can reduce bacterial contamination of water by 90 to 99.99% by filtering water with its seeds.     Science Daily has […]
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Amazing Facts

Flight Design: Flies and Birds Get it Wright
March 3, 2010
Parse the following sentence for logical consistency: “Just as the Wright brothers implemented controls to achieve stable airplane flight, flying insects have evolved behavioral strategies that ensure recovery from flight disturbances.”  That is the first sentence from a paper in PNAS yesterday about the stabilizers in fly wings.1  Ristroph et al just compared design principles […]
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Amazing Facts

Making Evolution Simple
February 25, 2010
Getting the vast diversity of highly complex creatures seems an impossible task for evolutionary theory, but some recent stories claim it’s not so hard.  Beak of the finch:  Darwin’s finches keep pecking their way into the media.  A new study claims that the wide diversity of beak shapes that have evolved can be explained by […]
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Spider Hair: The Perfect Water Repellant Surface
February 24, 2010
To keep dry, make like a spider.  “Engineering researchers have crafted a flat surface that refuses to get wet,” began a press release from University of Florida.  “Water droplets skitter across it like ball bearings tossed on ice.  The inspiration?  Not wax.  Not glass.  Not even Teflon.”  The audience waits breathlessly for the answer.  “Instead, […]
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The Brain You Use, and How It Uses You
February 21, 2010
Neuroscientists continue to find out amazing things about the human brain.  In some ways we are responsible to use our brains, but in other ways the brain does things to us.  If nobody has figured out where the dividing line is for thousands of years, it’s unlikely we will today; but the following findings can […]
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Molecular Highway Motor Comes into Focus
February 19, 2010
A beautiful new image of kinesin, a molecular machine that carries cargo on cellular highways, has been produced in greater detail than ever by a team at Berkeley and Brandeis Universities.  Science Daily published a picture and description of how kinesin works.  “Life’s smallest motor – a protein that shuttles cargo within cells and helps […]
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Life Is Smarter Than We Know
February 15, 2010
How can toads calculate?  How can cells without a brain or central nervous system figure out a balanced diet?  How can bugs navigate the wind for optimum flight time?  These are some of the questions that can arise from observations of the living world.  The more we learn about life, the more we find unexpected […]
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Life Masters Physics
February 10, 2010
Living things, especially cells, have mastered the forces of advanced physics in ingenious ways.  This ingenuity sometimes inspires physicists to try to copy it.  Here are some recent examples: Photosynthesis and quantum mechanics:  Nature reported that plants take advantage of quantum mechanics in photosynthesis.1  “The photosynthetic apparatus of cryptophyte algae is odd – its pigments […]
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Spider Webs Are Precision Dew Collectors
February 4, 2010
Photographs of dew drops on spider webs are favorite targets for nature photographers, because they resemble strings of pearls on fine jewelry (example 1, example 2).  But did you know the reason dewdrops bead up so well on webs is due to the fine microstructure of the spider silk?  A team of Chinese scientists studied […]
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Building a Cell: Staggering Complexity
February 2, 2010
“The living cell is a self-organizing, self-replicating, environmentally responsive machine of staggering complexity.”  Thus began a special section on “Building a Cell” in Nature last week.1  The section with five papers explores what is known about gene regulation, cell organization and signalling.  It’s an opportunity, as well, to see what scientists think about what they […]
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Barefoot Is Better
January 27, 2010
Who do we wear shoes?  It seems obvious; we expect that they help us avoid injuries and provide comfort.  Maybe we should think of the injuries we are getting by wearing them.     The image of the barefoot person is usually of someone poor, deprived, lower-class, hick, unclean, redneck or something else unattractive.  Shoes […]
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Molecular Machines Use Moving Parts
January 19, 2010
Research papers into the processes of molecular machines continue to reveal moving parts: “fingers” that open and close, ratchets that lock into place, and feet that move along tracks.  Here are a few samples from the voluminous literature that continues to pour from biophysics labs. DNA Polymerase I:  Scientific papers tend to be reserved in […]
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Arctic Tern Maintains World Record Title
January 14, 2010
The arctic tern makes a marathoner look like a wimp.  This little bird has been confirmed as the migratory bird with the longest route, flying annually from pole to pole.  A team of international scientists obtained the results by using an implanted geolocator on several birds, and tracking their actual path.  The story is told […]
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To Advance Technology, Make Like Nature
January 12, 2010
Scientists and engineers continue to find the most elegant solutions to practical problems by looking at plants and animals.  Here are a few of the recent examples. Wet computing:  Cells and brains do a superior job of complex processing, so why are our current computers singing how dry I am?  Not for much longer.  Science […]
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Best Look Ever at Life’s Smallest Rotary Motor
January 7, 2010
All cells trade in energy currency called ATP (adenosine triphosphate).  The molecular energy pellets are produced in profusion by molecular machines with rotary engines.  The engines contain all the standard parts: rotor, stator, energy input, and torque production.  They are embedded in the membranes of mitochondria and run on proton motive force.  We’ve reported many […]
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