The research touches on a question that has occupied the minds of philosophers and scientists for centuries.
"It is very encouraging news that being physically active on just one or two occasions per week is associated with a lower risk of death."
Researchers said they had discovered a type of tumour cell which spreads cancer from organ to organ.
Over 70% of the world's 40 million people living with HIV/AIDS are in Africa.
"For several years, we had followed smaller groups of patients and felt that many had died prematurely."
The initiative is geared towards developing prevention and treatment routines for NCDs and other diseases.
"This is one of nature's most remarkable feats of regeneration."
Adult heart stem cells have already been experimentally used in heart attack victims.
The drug, aducanumab, is only the latest antibody to show promise in an early, Phase I drug trial.
Dogs, like humans, use the brain's left hemisphere to interpret words.
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