Edward Willett

Archives

The end of tooth decay?

We’ve all had the importance of tooth-brushing drilled (sorry) into us from an early age, and it’s not hard to understand why: humans have been plagued by tooth decay for as long as we’ve been human, and had teeth.Cro-Magnon skulls 25,000 years old show evidence of tooth decay, for instance, and as long ago as 5,000 B.C. the Sumerians were wondering what caused toothaches (their theory, found on clay tablets: small gnawing worms within the affected tooth).The most common form of tooth disease is the “cavity,” more properly known as dental caries. Bacteria that live in the mouth react with carbohydrates to form acids that are strong enough to dissolve tooth enamel. Once acid has eaten ...

Posted by Edward Willett at 21:04, January 7th, 2008 under Blog, Science Columns | Comment now »

Jesus was on to something (well, duh!)

According to the Mayo Clinic, forgiveness is good for your health:Holding a grudge appears to affect the cardiovascular and nervous systems. In one study, people who focused on a personal grudge had elevated blood pressure and heart rates, as well as increased muscle tension and feelings of being less in control. When asked to imagine forgiving the person who had hurt them, the participants said they felt more positive and relaxed and thus, the changes dissipated. Other studies have shown that forgiveness has positive effects on psychological health, too.

Posted by Edward Willett at 18:26, January 4th, 2008 under Blog | 2 Comments »

Jesus was on to something (well, duh!)

According to the Mayo Clinic, forgiveness is good for your health:Holding a grudge appears to affect the cardiovascular and nervous systems. In one study, people who focused on a personal grudge had elevated blood pressure and heart rates, as well as increased muscle tension and feelings of being less in control. When asked to imagine forgiving the person who had hurt them, the participants said they felt more positive and relaxed and thus, the changes dissipated. Other studies have shown that forgiveness has positive effects on psychological health, too.

Posted by Edward Willett at 12:26, January 4th, 2008 under Blog | 2 Comments »

What’s it like in Level 4?

Download the audio version.Get my science column weekly as a podcast.***It’s a staple of movies and TV shows: the Level 4 lab, where scientists in “space suits” race against the clock to find a cure for a mysterious ailment.But what’s it like to work in a Level 4 laboratory in real life?Dr. James Strong knows. He’s head of the cell biology section of the department of special pathogens at the National Microbiology Laboratory in Winnipeg, where he is researching how Ebola is transmitted from animals to humans.Strong spends a couple of hours in the Level 4 lab more days than not, and I recently had a chance ...

Posted by Edward Willett at 15:41, November 13th, 2007 under Blog, Science Columns | Comment now »

Robot and human surgeons compare micro-gravity operating skills

Good news for future space travelers: the world's first demonstration of robotic surgery in a simulated micro-gravity environment takes place this week, in a collaborative effort between SRI International and the University of Cincinnati.On four parabolic flights September 25 to 28 aboard a NASA C-9 aircraft (nicknamed the "Weightless Wonder"), a human surgeon will match suturing and similar skills with a robot surgeon tele-operated from thousands of miles away. The robot surgeon is equipped with special software that ...

Posted by Edward Willett at 16:48, September 24th, 2007 under Blog | Comment now »

A needle today keeps disease away

Download the audio version.Get my science column weekly as a podcast.****Children, I have observed (and recall, for my own childhood has not yet faded into the misty depths of time) do not enjoy getting stuck with needles.And yet, getting stuck with needles is a part of growing up, because vaccinations, unpleasant as they momentarily are, are far less unpleasant than the diseases they help prevent.There are vaccines for diphtheria, tetanus, whooping cough and polio; for Haemophilus influenzae type b (which causes meningitis); for measles, mumps and rubella (German measles); for varicella (chicken pox) and hepatitis B. There are puneumococcal and meningococcal vaccines, and, of course, the annual influenza vaccine.Many of us of a certain age still bear ...

Posted by Edward Willett at 18:21, September 17th, 2007 under Blog, Science Columns | Comment now »

Break out the bubbly…the bubbly diet soda, that is

I was recently chided for drinking too much Diet Coke. "It may not have sugar, but it has aspertame, which is just as bad if not worse!"Well, "Pbbbbbbt!":"A sweeping review of research studies of aspartame says there is no evidence that the non-nutritive sweetener causes cancer, neurological damage or other health problems in humans."

Posted by Edward Willett at 21:08, September 11th, 2007 under Blog | 1 Comment »

The real health-care crisis…

..."Internet-Induced Hypochondria."

Posted by Edward Willett at 17:10, September 8th, 2007 under Blog | 1 Comment »

Source of fever identified

Humans have been dealing with fevers for millennia. Now scientists have, for the first time, identified the precise location in the brain that generates fever in the body:During periods of inflammation, such as when the body is fighting an infection or illness, the body produces hormones known as cytokines. The cytokines, in turn, act on blood vessels in the brain to produce PGE2."PGE2 then enters the brain's hypothalamus, causing fever, loss of appetite, fatigue and general feelings of sickness and achiness," says Saper, explaining that these common symptoms of illness function as an adaptive response to enable the body to better fight infection."When body temperature is elevated by a few degrees, white blood ...

Posted by Edward Willett at 4:45, August 6th, 2007 under Blog | Comment now »

Prosthetics

Humans are amazing creatures, but we aren't invulnerable, and every so often, we lose a piece of ourselves to accident, attack or disease: a finger, a toe, a hand, a foot, or even an entire limb. And sometimes, of course, due to a genetic problem, we're even born without a particular appendage.This is hardly unique to our era. People have suffered birth defects or lost pieces of themselves down through the ages--and for much of recorded history, they've done their best to use technology to replace those pieces.Just this week, scientists discovered what they believe may be the oldest-known functional prosthetic body part on the foot of an ancient Egyptian mummy.Researchers at the University ...

Posted by Edward Willett at 18:49, July 30th, 2007 under Blog, Science Columns | Comment now »