Muhammad Ali has been lauded for his oratorical skill, his activism and certainly his boxing. Yet for decades it's been believed that even one of the greatest boxers could not beat back the head trauma that led to the Parkinson's disease he suffered from since the 1980s. Yet was it really boxing that caused it? We are inching closer to learning the truth, but some questions remain.

With the Olympics quickly approaching, some people planning to attend are starting to feel that the possibility of getting Zika virus is not worth the risk. The latest is the "Today" show's Savannah Guthrie, who is pregnant. But a new study says the risk of infection is very small, stating that just 16 new cases of Zika will emerge.

Last week, we sat down with some of our scientists to discuss terms that they wish the general public would stop using when discussing science — and none of them held back. Caution: Comedy ahead.

While obesity prevalence for adult men didn't change much between 2005 and 2014, for women it increased significantly. This is true especially in Black and Hispanic women — groups that must be targeted for greater prevention efforts.

In what is just one more example of fear-based marketing, a company is selling "natural chemical" bracelets that supposedly protect kids from mosquitoes. Not only is this not going to work, but the natural chemical is just as toxic as DEET — the insect repellant that the company takes great pains to note, is absent. If this was on "Jeopardy" we'd call out this firm accordingly.

Palliative care services are misunderstood by clinicians and patients alike. However, research has shown that early discussions and referral palliative care soon after diagnosis yield significantly better results with respect to expectations, quality of life, less aggressive interventions and even survival.

Shell Canada has contributed 860,000 hectares of offshore rights in the waters of Baffin Bay to the Nature Conservancy of Canada.

The neurotransmitter dopamine -- which is most famously associated with the "reward system" in the brain -- is also linked to eye blink rate and time perception, both of which are in constant flux. Immediately after a blink, time is perceived to go by a little more slowly.

When it comes to helping people quit smoking, there is no such thing as an aggressive method. It's time for the United States to use pictorial warning labels, even if they are disturbing, to aid smokers to kick an awful and deadly habit.

Copper, that darling of gourmet chefs, is great for cookware but not so effective for arthritis sufferers. But eventually it may actually help promote fat breakdown in the body — if, that is, the results of a new study can be replicated.