What controls aging? Biochemist Cynthia Kenyon has found a genetic mutation that can more than double the lifespan of a tiny worm, which points to how we might one day significantly extend human life.
Medical ethicist Harvey Fineberg says "neo-evolution" is on the horizon. When it becomes easier to eliminate disease through gene therapy, will we change the trajectory of evolution?
The World Health Organization isn't ready for the next pandemic or international health crisis, so the agency's leader is calling for major reforms. But will the changes be enough?
Stephanie Packer's debilitating illnesses leave her in a lot of pain. But she is opposed to a California bill that would legalize physician-assisted suicide.
Ophthalmologists and cornea specialists have raised concerns about the lenses, citing studies and their own experiences treating children and teens who developed eye infections after wearing them.
Avian influenza is ravaging poultry flocks across the Upper Midwest. The virus is "doing things we've never seen it do before," and understanding about transmission is very limited, a scientist says.
In some counties in the South, almost 20 percent of adults have severe vision loss. And those communities are also likely to be among the nation's poorest. Lack of regular eye care is just one issue.
Black women are more likely to have heart disease with just a few metabolic risk factors, a study finds. That's not the case for white women. Being obese seems to affect black women more, too.
Iowa Republican Sen. Chuck Grassley is asking the Obama administration pointed questions about what is being done to investigate alleged fraud, waste and abuse by Medicare Advantage plans.