People who are interested in and paying close attention to each other begin to speak more alike, a psychologist says. iStockphoto.com hide caption

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Staying fit and eating well can help cancer survivors, too, a review of the latest evidence shows. Lucy Pemoni/AP hide caption

itoggle caption Lucy Pemoni/AP

Here goes nothing. A big jump over the Zambezi River in Africa. James Whatley/Flickr hide caption

itoggle caption James Whatley/Flickr

A competitor stops for a cigarette after he broke down during the Enduropale race at Le Touquet Beach on February 22, 2009 in Le Touquet, France. Paul Gilham/Getty Images hide caption

itoggle caption Paul Gilham/Getty Images