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A closed-door summit on controversial bird flu research starts today, and the newly released guest list reveals that the event will be dominated by virologists.

Scientists working with bird flu recently called a 60-day halt on some controversial experiments, and the unusual move has been compared to a famous moratorium on genetic engineering in the 1970s.

But key scientists involved in that event disagree on whether history is repeating itself.

"I see an amazing similarity," says Nobel Prize winner Paul Berg, of Stanford University.

Last month, scientists around the world agreed to temporarily halt certain genetic experiments with bird flu viruses. More than three weeks of that 60-day moratorium have already passed. And the scientific community is in the midst of a fierce debate about what needs to happen next.

The suspension of the research came in response to fears that researchers had created dangerous new germs that could cause a devastating pandemic in people if they ever escaped the lab or fell into the wrong hands.

The World Health Organization has just one week left to prepare for a highly anticipated meeting on controversial bird flu research. One official says that 22 invitations have gone out and the WHO is still waiting to hear back from some of the invitees.

Recent experiments involving the H5N1 bird flu virus have caused a furor in the science community, and the WHO was urged to convene an international discussion.

Any job that involves breaking up rock or concrete or brick can potentially expose workers to dangerous silica dust, and last year it looked like the Department of Labor's Occupational Safety and Health Administration was about to put stricter controls in place to limit this health hazard.

Scientists have said that they are voluntarily putting some controversial bird flu research on hold.

The move to suspend the work for 60 days comes in response to critics who say their work is dangerous.

People rarely get sick with bird flu, caused by the H5N1 virus, and when they do, they're generally not contagious.

Scientists do experiments with millions of rats and mice each year, to study everything from heart disease to cancer to diabetes. Recently, some new recommendations about how to house female lab rodents and their babies caused an uproar, with experts at major research institutions now saying they're unsure of what they'll have to do to keep their government funding.

The original Christmas presents were gold, frankincense and myrrh. That's what wise men brought to the baby Jesus, according to the Gospel of Matthew. Frankincense is still used today — for perfumes, incense and traditional medicines — but a new study suggests that its future looks grim.

Critics cried foul when Department of Health and Human Services Secretary Kathleen Sebelius overruled the Food and Drug Administration earlier this month, saying that teenage girls can't buy the emergency contraceptive plan B without a prescription. Their complaint: That the move went against the Obama administration's stated goal of protecting science from the taint of politics.

A committee that advises the government says that details of two controversial experiments on bird flu virus should not be made public, because of fears that the work could provide a recipe for a bioweapon.

The government-funded experiments were done by researchers who wanted to understand if bird flu virus might change in the future to cause a pandemic in people. By tweaking genes, they made the deadly bird flu virus more contagious between lab animals.