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Left Nostril Right Brain

A recent experiment performed by researchers at Philadelphia's Monell Chemical Senses Center, probably the world's pre-eminent institution devoted to the study of smell, showed that the world smells different through your two nostrils. When the participants in the experiment sniffed through their left nostril, connecting to their left brain, they ...

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LeftNostrilRightBrain
Geology

Is the Dead Sea really dead?

The Dead Sea is located on the boundary between Israel and Jordan at a lowest point on earth, at 400 meters (1,320 feet) below sea level. All waters from the region, including the biggest source, the ... Continue reading

IstheDeadSeareallydead
Geology

What are Hoodoos?

Hoodoos or Goblins are one of the most spectacular displays of erosion. They are geological formations, rocks protruding upwards from the bedrock like some mythical beings, conveying the story of ... Continue reading

WhatareHoodoos
Biology

Throw Out Your Thermometer

If you're out camping, and you've left your favorite thermometer at home, how can you figure out the temperature? Not the most earth-shaking problem, we admit, but there is an all natural way to find ... Continue reading

Thermometer
Biology

Does Your Beagle Have A Belly Button?

Our navels, also know as belly buttons, are scars left over from our umbilical cords. While in the mother's womb, a baby receives food and oxygen and rids itself of waste through the umbilical cord. ... Continue reading

BeagleBellyButton

Why Do We Call It A 'Vaccination?'

VaccinationSmallpox 'vaccinations' are in the news nowadays. What is smallpox and what is a vaccination? Smallpox is one of the oldest and most horrible diseases afflicting the human family. In the past, it killed twenty to sixty percent of victims, and left the survivors with disfiguring scars from the rash.

Early on people realized that survivors of smallpox were immune to further attacks. Over a hundred years before our present form of vaccination, a practice called 'variolation' was used, beginning in China and Asia and reaching Europe by the beginning of the 18th century. Variolation consisted of applying the pus or ground scabs from a patient who had a mild case of smallpox (also called variola, hence the name) to a scratch in the skin. This system wasn't very good: two or three percent of variolated people died of smallpox. But it was better than the 20-60 percent who might die in an epidemic. By the 18th century, people had noticed that those who had had a milder disease called cowpox were also immune from smallpox. Milkmaids often caught it from their cows.

So in the late 18th century, Edward Jenner invented the practice we now know as vaccination, so called from 'vaca', the latin word for 'cow'. Patients were innoculated with material from cowpox lesions, which is much safer than variolation because cowpox is a milder illness. Today, most adults over the age of 35 have a small round scar on their upper arm where they were vaccinated as children.