Tuesday, November 20, 2012

The Rising Cost of Sick Days?

In the news:
by Michelle Andrews
September 25, 2012
NPR Health News
Three Stethoscopes
  FC1539
Two stethoscopes sitting on a white surface. The stethoscopes are forming the dollar symbol.
Credit: 3D4Medical / Science Source

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Thursday, November 15, 2012

Climate and Mayan Civilization

In the news:
By Bruce Bower
Science News
November 8, 2012
A dawn silhouette showing Mayan Indians at work on excavating a temple, Orange Walk, Belize.
Credit: Lowell Georgia / Science Source

Science Source® is a registered trademark of Photo Researchers, Inc. 

Tuesday, November 13, 2012

Precursors to Alzheimer's Detected at Younger Age

In the news:
by Pam Belluck
New York Times
November 12, 2012
Alzheimer's disease. Sliced sections from two brains. On the left is a normal brain of a 70-year-old. On the right is the brain of a 70-year-old with Alzheimer's disease. The right brain is atrophied with a loss of cortex and white matter. Alzheimer's disease is a dementing disorder marked by certain brain changes regardless of the age of onset. It is not a normal part of aging. It is a dementing disorder that leads to the loss of mental and physical functions. The chance of developing Alzheimer's increases with age.
Credit: Jessica Wilson / Science Source


 

Friday, November 2, 2012

The Perfect Franken-Storm

In the news:
by Alexandra Witze
Science News
October 31, 2012 
Earth's wind patterns, schematic view. Atmospheric circulation in each hemisphere consists of three cells. The Hadley Cell (labeled) dominates the tropical atmosphere and is intimately related to the trade winds, tropical rain belts, subtropical deserts and the jet streams. The Polar Cell (labeled) produces the polar easterlies. The outflow from the Polar Cell creates waves in the atmosphere known as Rossby waves which play an important role in determining the path of the jet stream. The polar cell also balances the Hadley Cell in the Earth's energy equation. The Ferrel Cell (labeled) is dependent upon the Hadley Cell and the Polar Cell and just as the trade winds can be found below the Hadley Cell, the westerlies can be found beneath the Ferrel Cell.
Credit: European Space Agency / AOES Medialab / Science Source

Science Source® is a registered trademark of Photo Researchers, Inc.