Bottlenose dolphin leaders more likely to lead relatives than unrelated individuals

Traveling into uncharted territory in search of food can be a dangerous undertaking, but some bottlenose dolphins may benefit by moving through their habitat with relatives who may be more experienced or knowledgeable. It turns out that leaders in bottlenose dolphin groups in the Florida Keys are more likely to be related to the dolphins that follow them, according to research published March 13 by Jennifer Lewis and colleagues from Florida International University.

Early signs of heart trouble in obese youth found in study

A study that used two-dimensional echocardiography to closely examine the hearts of 100 children and teens found physical and functional signs of future heart problems already developing in obese children.

In the study, published online today in the Journal of the American College of Cardiology, researchers from the University of Leipzig Heart Center in Leipzig, Germany, performed the echocardiograms on 61 obese children and 40 non-obese children ages 9 to 16.

Five daily portions of fruit and vegetables may be enough to lower risk of early death

Eating five daily portions of fruit and vegetables is associated with a lower risk of death from any cause, particularly from cardiovascular disease, but beyond five portions appears to have no further effect, finds a new study.

These results conflict with a recent study published in BMJ's Journal of Epidemiology and Community Health suggesting that seven or more daily portions of fruits and vegetables were linked to lowest risk of death.

Brain 'can classify words during sleep'

The brain is still active while we are asleep, say scientists, who found people were able to classify words during their slumber.

Researchers from Cambridge and Paris introduced participants to a word test while awake and found they continued to respond correctly while asleep.

Possible Neurobiological Basis for Tradeoff Between Honesty, Self-Interest

How does the brain make choices about honesty?

What's the price on your integrity? Tell the truth; everyone has a tipping point. We all want to be honest, but at some point, we'll lie if the benefit is great enough. Now, scientists have confirmed the area of the brain in which we make that decision.

The result was published online this week in Nature Neuroscience.

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