Rob Stein

Rob Stein is a correspondent and senior editor on NPR's science desk.

An award-winning science journalist with more than 25 years of experience, Stein mostly covers health and medicine. He tends to focus on stories that illustrate the intersection of science, health, politics, social trends, ethics, and federal science policy. He tracks genetics, stem cells, cancer research, women's health issues and other science, medical, and health policy news.

Before NPR, Stein worked at The Washington Post for 16 years, first as the newspaper's science editor and then as a national health reporter. Earlier in his career, Stein spent about four years as an editor at NPR's science desk. Before that, he was a science reporter for United Press International (UPI) in Boston and the science editor of the international wire service in Washington.

Stein is a graduate of the University of Massachusetts, Amherst. He completed a journalism fellowship at the Harvard School of Public Health, a program in science and religion at the University of Cambridge, and a summer science writer's workshop at the Marine Biological Laboratory in Woods Hole, Mass.

Stein's work has been honored by many organizations, including the National Academy of Sciences, the American Association for the Advancement of Science and the Association of Health Care Journalists.

A group of scientists say they want work toward being able to create a synthetic version of the entire human genetic code in the laboratory.

Their hope is that a complete set of synthetic human DNA, known as a genome, could someday lead to important medical breakthroughs.

Lindsey McFarland was born without a uterus. So she and her husband, Blake, created their family by adopting three boys. But they always dreamed that she could somehow become pregnant and give birth to a baby.

"We just wanted that experience," Lindsey says. "We wanted that connection."

She longed to feel a baby kick and develop inside her. She wanted the thrill of discovering the sex of the fetus during a routine sonogram. She even wanted to go through morning sickness and labor.

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A handful of scientists around the United States are trying to do something that some people find disturbing: make embryos that are part human, part animal.

The researchers hope these embryos, known as chimeras, could eventually help save the lives of people with a wide range of diseases.

One way would be to use chimera embryos to create better animal models to study how human diseases happen and how they progress.

Perhaps the boldest hope is to create farm animals that have human organs that could be transplanted into terminally ill patients.

Scientists have been able to make and study human embryos in their labs for decades. But they have never been able to keep them alive outside a woman's womb for more than about a week.

That limitation meant scientists were unable to conduct a range of detailed research into early human development.

But now researchers say they have discovered a way to keep human embryos alive in the laboratory about a week longer than ever before, and through a critical period of development.

It's just before dawn in Piracicaba, a small city in southeastern Brazil, when a large white van pulls over to the side of the road. A door slides open, revealing stacks of crates jammed with plastic pots. Each pot is buzzing with mosquitoes.

"There's about 1,000 mosquitoes in each of those pots," says Guilherme Trivellato, who works for Oxitec, a biotech company that owns the van. All together, there are more than 300,000 mosquitoes swarming inside those pots.

"That's how many we're going to release today," he says.

The Food and Drug Administration said Tuesday that all fast-acting opioid pain medicines will be required to carry its strongest warning about risks, including the risks for abuse, addiction, overdose and death.

There's something different about the way these babies cry.

That's a realization that hit me after spending day after day with babies in Brazil who were born to mothers who were infected with the Zika virus when they were pregnant.

It's not just that they cry more easily, and longer — which they do. There's also something strange — harsher and more pained — about the cries of many of these babies.

The Zika virus has sparked international alarm largely because of fears that the pathogen is causing microcephaly, a condition in which babies are born with unusually small heads and damaged brains.

But the preliminary results of a study released Friday suggest Zika can also cause other potentially grave complications for fetuses carried by women who get infected while they are pregnant.

Every morning since I arrived in Brazil to cover the Zika outbreak, the first thing I do is douse myself with insect repellent before venturing outside.

I know the chances I'll catch Zika are pretty low, and the disease tends to be relatively mild for most healthy adult males. But with all the alarm about the virus, it's hard not to start to get a little paranoid about catching Zika from a mosquito.

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