People smell yummy to mosquitoes. So yummy, in fact, that our scent is a big way the pesky insects track us down. But just how much mosquitoes like Eau de Human may not be entirely up to the bugs.

Mosquitoes are more attracted to human odors when they're infected with the malaria parasite, scientists reported Wednesday in the journal PLOS ONE.

Scientists say they have, for the first time, cloned human embryos capable of producing embryonic stem cells.

The accomplishment is a long-sought step toward harnessing the potential power of embryonic stem cells to treat many human diseases. But the work also raises a host of ethical concerns.

On Wednesday's Morning Edition, David Greene talks with writer and breast cancer survivor Peggy Orenstein about actress Angelina Jolie's decision to have a double mastectomy to reduce her risk of breast cancer.

Angelina Jolie just became part of a medical trend: More women are deciding to have their breasts removed to reduce the risk of cancer.

Over the past decade, doctors have noticed a big increase in the number of women choosing prophylactic, or preventive, mastectomies.