Health

GOP presidential candidate Mitt Romney has been firmly anti-abortion during this campaign.

But during Tuesday's debate on Long Island, N.Y., Romney charged that President Obama misrepresented his position on birth control. Here's what Obama said, during what began as a discussion of pay equity for women:

Treatment for Alzheimer's probably needs to begin years or even decades before symptoms of the disease start to appear, scientists reported at this week's Society for Neuroscience meeting in New Orleans.

"By the time an Alzheimer's patient is diagnosed even with mild or moderate Alzheimer's there is very, very extensive neuron death," said John Morrison of Mount Sinai Medical School in New York. "And the neurons that die are precisely those neurons that allow you to navigate the world and make sense of the world."

Pakistan is one of the remaining corners of the world where polio still lingers. Last year, the government declared a national emergency, and with the help of international institutions, embarked on an aggressive vaccination campaign.

So far, the results have been promising. The number of new polio cases is about a third of last year's total of 198.

But the new campaign, like previous efforts, hasn't been able to overcome one critical problem: getting into parts of Pakistan's lawless tribal regions along the border with Afghanistan to vaccinate the children there.

Accidental falls are one of the leading causes of injury death in people over 65 worldwide, but for a long time researchers have struggled to understand just how they happen.