Dolphins Have Names

It turns out that there’s strong evidence to suggest that at least one kind of dolphin sound, studied extensively over the past decade, does function as a kind of referential symbol. Dolphins use distinct “signature whistles” to identify and call to one another.  Each dolphin is thought to invent a unique name for itself as a calf and to keep […]

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The Danger of Annual Checkups

Visiting your doctor for an annual physical examination might actually have a negative impact on your health, WebMD.com reports. Danish researchers analyzed studies involving 183,000 patients and found that those who received regular checkups were no less likely to die of cancer or heart disease than those who only saw the doctor when they had symptoms. People who skipped their […]

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Are your sleeping pills killing you?

People who use sleeping pills regularly are far more likely to die prematurely than those who don’t, according to a new study. Researchers compared the health records of more than 10,000 sleeping-pill users with those of other patients of similar ages and health histories who didn’t use the drugs. They found that the heaviest sleeping-pill users were five times more […]

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