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Dumb Ideas

The Evolution of Spite
January 21, 2006
Since everything evolves, according to consensus science, why not attitudes like spite?  The BBC News reported about a University College London study on attitudes of revenge between the sexes.  They found that men seemed to get more satisfaction out of hurting foes than women.  This is all part of an evolutionary explanation for altruistic behavior […]
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Birds

Observing Animals for Fun and Profit
January 11, 2006
Whether scientists watch Animal Planet for inspiration or not, they often are fixated on the wonders in the animal kingdom and want to understand and imitate them.  Here are some recent examples: Waddle of the Penguins:  Max Kurz at U of Houston enjoys watching cuddly penguins like most of us, but wonders how they waddle […]
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Dumb Ideas

Do Guppies Make Good Darwinian Grandmothers?
December 31, 2005
If a report on EurekAlert is right, some evolutionary biologists used lack of evidence for natural selection as confirmation for evolution.  They predicted guppies would show no evidence of a “grandmother effect” on life history after reproduction, and “that is what they found.”     The question under study is why evolution keeps aging individuals […]
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Terrestrial Zoology

Evolutionary “Arms Race” – Is Coevolution Relentless?
December 29, 2005
Camellias and the weevils that attack their seeds seem locked in conflict.  The thicker a camellia grows its protective woody covering around its seeds, the longer the feeding tube on some weevil to break through and devour.  John R. Thompson talked about such “coevolutionary arms races” in Current Biology1 and asked whether such wars can […]
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Marine Biology

Bombardier of the Sea
December 28, 2005
Creationists have made much of the bombardier beetle (#1, #2) whose firing chambers would explode if the timing and mixture of ingredients did not work perfectly together.  Now, here is a similar case in the lowly sea slug.  EurekAlert described research by Georgia State University scientists, who found that the sea slug Aplysia mixes three […]
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Genetics

How Blind Cave Fish Lose Color
December 26, 2005
A study on cave fish revealed that several populations can have mutations to the same gene.  A gene that produces melanin, named Oca2, was found to be mutated in two separate populations of cave fish, resulting in albinism.  This same gene can produce albinism in humans. The replicated experiment is a powerful tool for experimental […]
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Biology

Undersea Christmas Lights Explained
December 19, 2005
There is a marine animal like a jellyfish that puts on one of the most dazzling light shows in nature.  Some ctenophores, or comb jellies, can send multi-colored pulses of light that radiate down their sides in a rainbow of colors.  If you’ve ever seen one of these on a TV nature show, you were […]
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Mammals

Marine Unicorn Tusk is a Precision Sensor
December 13, 2005
Unicorns exist – in the north sea.  Not horses, these are marine mammals, called narwhals, a kind of whale that sports a unique spiraling tooth that gives them the appearance of a unicorn.  Scientists have puzzled for centuries over what these tusks are for.  Leading theories were that males used them for joisting to defend […]
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Mammals

New Mammal Discovered in Borneo
December 6, 2005
Caught on camera: a cat-sized quadruped with a long, bushy tail.  See the picture on National Geographic News.  Found in Borneo’s rain forests, it is so new we don’t know what to call it yet.  The article says this is the “first new mammal species discovered on the Southeast Asian island in more than a […]
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Human Body

How You Tune In
December 5, 2005
Studies on rats have shown there are certain neurons that respond to changes in the background sound (see LiveScience story on MSNBC News).  We humans probably have these, too.  Rather than firing continuously, they search for changes in the auditory landscape that might be of interest: changes in pitch, loudness or duration in single sounds […]
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Birds

Archaeopteryx in the Headlines Again: New Specimen Reported
December 2, 2005
The best-preserved fossil yet of Archaeopteryx was announced in Science this week,1 the tenth in all.  This one, described by Gerald Mayr of the Senckenberg Natural History Museum (Frankfurt, Germany), had a better-preserved foot than the others (all found in the Solnhofen Limestone beds of Bavaria) with indications it had a hyperextendable second toe somewhat […]
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Biomimetics

Eyes on the Prize: Science Sees Gold in Biomimetics
November 19, 2005
A fly eye made the cover of Science this week.1  It’s not that the compound eye is interesting to entomologists; MSNBC News picked up on the real message: “Animal eyes inspire new technology – Researchers learn optics lessons from biology.”  The cover story is about biomimetics, or reverse-engineering nature.  Scientists are looking for ways to […]
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Physics

Butterflies Invented LEDs First
November 18, 2005
Light-emitting diodes (LEDs) were a prized invention of physicists, improved greatly in 2001, but now we find butterflies invented them first.  We already knew that butterfly wings achieve their shimmering iridescence by means of photonic crystals (01/29/2003), as do some birds (10/13/2003), but now it appears that the butterflies have even more exotic tricks up […]
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Birds

News from the Cretaceous
November 16, 2005
Here are some recent stories about extinct reptiles and bird-like creatures from the age of dinosaurs. T. Rex Smelled Good:  A story in Science1 listed evidence that Tyrannosaurus rex had a large olfactory bulb, giving it a good sense of smell.  Analysis of the visual and auditory parts of the skull suggest that it also […]
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Biomimetics

Scientists Learning How to Harness Cellular Trucks
November 15, 2005
In an article that blurs the line between biology and technology, a press release from the Max Planck Institute (see EurekAlert for English translation) described the amazing performance of the nanoscopic trucks that ride the cell’s microtubule superhighways.  Kinesin and myosin motors, fueled by ATP, usually “sprint” on the trackways for short distances, but working […]
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