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Maria Cheng

Brain and arm implants help paralyzed man feed himself

LONDON – A paralyzed man was able to feed himself for the first time in eight years, after doctors implanted sensors in his brain that sent signals to his arm. Bill Kochevar was p...

Indigenous Bolivians have some of the healthiest hearts

LONDON – Deep in the Bolivian Amazon lives a group of indigenous people who spend their days hunting and farming. Researchers say this may be partly why they have some of the healthiest hear...

UN sees bird flu changes but calls risk of people spread low

LONDON – The World Health Organization says it has noticed changes in the bird flu virus now spreading in China, but says the risk of the disease spreading easily between people remains low....

Life expectancy to keep rising; South Korean women could hit 91

But the news for Americans is not good

Don’t expect Fitbits to improve health, help drop pounds

LONDON – Wearing a fitness tracker may help you keep tabs on how many steps you take, but the devices themselves – even with the lure of a cash reward – probably won’t improve your health, a...

Treat or monitor early prostate cancer? 10-year survival rate is the same

LONDON – Men with early prostate cancer who choose to closely monitor their disease are just as likely to survive at least 10 years as those who have surgery or radiation, finds a major stud...

Smartphone use in the dark causes temporary blindness

LONDON – Warning: Looking at your smartphone while lying in bed at night could wreak havoc on your vision. Two women went temporarily blind from constantly checking their phones ...

Coffee struck from list of possible cancer-causing agents

LONDON – Go on, have another cup. Coffee is now off the list of things that could possibly cause cancer. Experts convened by the World Health Organization’s cancer research arm d...

Britain approves contentious gene-editing experiments

LONDON – In a landmark decision that some ethicists warned is a step down the path toward “designer babies,” Britain gave scientists approval Monday to conduct gene-editing experiments on hu...

Plague may have been spreading much earlier than once believed

LONDON – The plague was spreading nearly 3,000 years before previously thought, scientists say after finding traces of the disease in the teeth of ancient people – a discovery that could pro...

Transplanting ovarian tissue helps some women have babies

LONDON – The biggest study ever of women who had ovarian tissue removed, frozen and transplanted suggests the experimental technique is safe and can help about one third of them have babies....

Study: Tiny, wireless pacemaker could be surgery-free option

LONDON – A tiny, wireless pacemaker could offer some heart patients a surgery-free alternative to the traditional devices, a new study says. Some doctors, however, say there are lingering sa...