Mastering metabolism for shark and ray survival

Understanding the internal energy flow—including the metabolism—of large ocean creatures like sharks and rays could be key to their survival in a changing climate, according to a new study.

Is there a limit to human endurance? Science says yes

From the Ironman triathlon to the Tour de France, some competitions test the limits of even the toughest endurance athletes. Now, a new study of energy expenditure during some of the world's longest, most grueling sporting ...

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