A crow-sized bird that lived in China 150 million years ago had undersized wings that may have made it more of a runner than a flier--which paints a more complicated picture of avian evolution.
Pope Leo was diagnosed with lung adenocarcinoma after doctors removed the lower lobe of his right lung during surgery on Tuesday, the Vatican said. Some facts about the disease.
Few animals show the link between size and lifespan as clearly as dogs. Within this one species, large breeds such as Great Danes typically die younger than small ones such as Chihuahuas.
Google has unveiled the Fitbit Edge, a next-generation fitness tracker featuring advanced health monitoring, workout tracking and personalized coaching in a slim design.
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