breathing

A monitor lizard's lungs have special sacs that allow  them to absorb oxygen while inhaling and exhaling. (Getty Images)

Monitor Lizards Breathe More Efficiently Than Humans

Their lungs allow them to absorb oxygen while inhaling and exhaling.

12/18/2013

(credit: AP Photo/Matt York)

Passenger Who Died On Flight Had Heart Problems

Police say a 61-year-old man who died on a flight that was diverted to Indianapolis over the weekend had heart-related illnesses and bone cancer.

08/01/2011

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