Top news for December 21, 2008

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Unlocking the Secrets of Animal Communication: Dogs Show Things to Humans but Pigs Do Not

Earth's Inner Core May Right Now Be in The Process of Changing Direction

An Atmospheric Scientist Explains That Viral Rose-Colored ‘UFO’ Cloud

New Multi-Drug Resistant Gonorrhea Detected In U.S., 2 Cases In Massachusetts

The Benefits – and Serious Risks – of Alternative Heart Failure Treatments

Social isolation linked to an increased risk of dementia, new study finds

Six minutes of high-intensity exercise vital for brain health, study says

The flower-shaped telescope with which NASA intends to search for new worlds

Viagra Linked to Much Lower Risk of Death in Men, But Questions Remain

Hubble Captures Breathtaking Image of Tempestuous Young Stars in Orion