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Because of fears that lab-altered bird flu viruses could cause a deadly pandemic if they ever escaped the lab, scientists agreed to a moratorium on mutant H5N1 flu research eight months ago. Now top scientists in the field continue the debate about the work, publishing six commentaries for and against the end of the moratorium.

The crowds that cheered the shuttle on Saturday changed their tune after a night of hassles that left the Endeavour still blocking L.A. traffic and threatening trees early Sunday morning.

Boston physician Vivek Murthy, an outspoken supporter of the Affordable Care Act, told a Senate panel that as surgeon general he'll focus on obesity, smoking cessation and vaccinating kids.

Press secretary Jay Carney responds to a new book by former Defense Secretary Robert Gates, saying disagreement is a welcome part of a "robust" policymaking process.

Space weather can be heard, in a sense, by tuning in to CRaTER Radio, a "sonification" project that uses data from a NASA lunar orbiter to generate musical sounds. The results are then streamed onto the Internet.

There can be twists and turns in the Senate confirmation process. President Biden has asked former Sen. Doug Jones of Alabama to help his nominee through meetings and hearings.

Research shows that sleep deprivation makes people emotionally volatile and temperamental — a fact that hasn't escaped the notice of some reality TV producers, who deny contestants sleep in an effort to kick up televised drama.

The threat of Russia invading Ukraine is real, the Biden administration insists. At the same time, top officials say they hope that being vocal about the intelligence they have could deter action.

A top Russian figure skater was allowed to compete despite testing positive for a banned substance before the Games. Kamila Valieva, age 15, helped Russia win the team event earlier this week.

As top law enforcement officials prepared to brief the media on the arrest of seven suspected terrorists in Miami, Homeland Security Secretary Michael Chertoff was otherwise involved. He was meeting with producers and some cast members of the Fox TV counterterrorism show 24.