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Bless Your Heart: Exercise for Senior Vitality

A study from UT Southwestern Medical Center at Dallas confirms what we all should know but need to be reminded of frequently: that prolonged, sustained exercise can build up the heart at any age, and provide insurance against heart failure.  The summary on EurekAlert warns, “a sedentary lifestyle, in addition to aging, puts older people […]

Natural Selection Demonstrated in European Heart-Disease Gene?

Stephen Wooding (U. of Utah) is elated.  He sees an “exciting trend” in genetic research that might, finally, demonstrate positive natural selection acting on a gene with a clear phenotypic effect (measurable outward benefit).  Writing in the Sept. 7 Current Biology,1 he mentions a few recent papers suggesting this connection, but focuses particularly on one […]

What Would a Man Born Blind See With New Eyes?

The Bible records an instance of a man born blind miraculously healed, who was immediately able to walk and recognize things.  Scientists had doubted whether a blind person suddenly able to see would understand the world of vision at all, or be able to make any sense of his new sense.  Then a real world […]

Germs and Venoms Can Heal

Three recent stories indicate that “nasty” things can be good, under the right circumstances: Germs and Aging:  Science Now reported that germs may prolong life.  A study on fruit flies showed that flies whose embryos were exposed to bacteria lived longer than those grown under sterile conditions.  Apparently the germs provide services in regulating genes […]

Humans Lose Some, Win Some in Animal Olympics

Imagine humans competing in Olympic events with animals.  Astrobiology Magazine predicts we would lose many events, but excel in others: “In most cases of physical competition, the animals beat us at our own games,” says the website’s staff writer, Dr. David Noever. 100 Meter Sprint:  Cheetah wins the gold at 3 seconds.  Silver goes to […]

Inner Ear Hairs Provide Optimum Sensitivity

The inner ear cochlea is lined with hair cells that transduce mechanical vibrations into electrical signals for the auditory nerve.  European scientists publishing in PNAS1 measured the sensitivity of inner ear hair cells to mechanical motion, and considering the noise caused by thermal motion, calculated that the ear operates at the optimum level.  The ear […]

Your Brain Learned Physics and Calculus Before You Did

Tilt your head to the right while moving to the left.  The neurons in your brain just solved Newton’s equations of motion, and performed complex vector calculus equations almost instantaneously.  That’s what four neurologists Washington University of Medicine (St. Louis, MO) essentially claimed in Nature July 29,1 describing how your brain interprets the information coming […]

Think Before You Speak

Children are capable of thoughts before they have the words to vocalize them, according to a study published in Nature July 221 (see also summary by Paul Bloom in the same issue2 and report on Science Now).  This contradicts the postmodernist view that thought is conditioned by language, and instead suggests that humans are innately […]

You Have Motorized Sunscreens in Your Eyeballs

The pain of walking suddenly into a bright light sets up an amazing reaction, according to EurekAlert.  An alarm is sent to the fire station in the retinal cell.  There, protein firefighters hop onto a motorized shuttle on the molecular railway, and once firmly attached, are ferried swiftly to the scene of danger.  There, they […]

Blame Evolution

Men can’t help themselves.  Evolution made them that way.  That’s the gist of a science story on ABC news.  Accompanied with a picture of rebel without a cause James Dean, it begins, “Research shows that simply being male means you’re more likely to die as a young adult.  Why?  Blame evolution…and pursuit of the opposite […]

Haemoglobin More Complex than Thought: Regulates Blood Flow

Physiologists have long known that haemoglobin, the molecule that adds the redness to red blood cells and carries oxygen to the tissues, releases its oxygen as the blood vessels constrict.  Now, increasing evidence shows that haemoglobin (composed of four complex proteins that surround a central iron atom) is not just a passive oxygen carrier.  It […]

Parasitic Worms Regulate Immune System

Most people will not be ready to stomach a suggestion from the July 9 issue of Science1: parasitic worms can be good for you.  Yikes: what’s next– worm therapy?     According to Joel Weinstock of the University of Iowa, evidence is increasing that worms help regulate the immune system, and show promising results for […]

Babies Walk in the Womb

New vivid ultrasound imaging technologies reveal a nursery of activity inside the womb, reports the BBC News.  Click the link to see the amazingly clear pictures.  Unborn babies have been observed stretching, kicking and leaping from 12 weeks, before the mother is aware, and “From 26 weeks, they appear to exhibit a whole range of […]

Can Natural Processes Create a Mind?

No problemo, says H. Clark Barrett (UCLA), getting a mind from mindless matter.  In a review of a book by developmental psychologist Gary Marcus published in Science June 11,1 Barrett was reassured by Marcus’ book that evolutionary theory working within natural law is up to the task: “The strengths of The Birth of the Mind […]

MRI Overtaking X-Rays

The British Medical Journal 12 June cover story1 says that recent advances in magnetic resonance imaging may soon make MRI supersede X-ray as the preferred technology for whole body imaging.  MRI avoids the damage caused by X-rays and provides more contrast and detail, especially in the detection of cancer.  MRI is also replacing traditional autopsy […]
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