A recent study by a National Academy of Sciences panel found great potential in antiprogestins, a class of drug used in RU-486.

Dr. Benner's National Academy of Sciences panel is using such experimental results to formulate a strategy to search for weird life.

A National Academy of Sciences panel warned that the nation's system of environmental satellites was "at risk of collapse."

And a National Academy of Sciences panel concluded that Chicago's schools do so much "teaching to the test" that it is unclear if real progress occurs.

Meanwhile, a National Academy of Sciences panel concluded that organisms developed through genetic engineering do not present any "unique" ecological risk.

The National Academy of Sciences panel considered both studies, and others.

- National Academy of Sciences panel on genetic engineering.

Dr. David is chairman of a National Academy of Sciences panel studying scientific misconduct.

He was co-chairman of a 1998 National Academy of Sciences panel on bomb threats, which called for, among other actions, registering buyers of the fertilizer.

The National Zoo has improved the care it gives its animals, but must still remedy serious deficiencies, a National Academy of Sciences panel reported.