21.   Scientists have long wondered why animals took so long to evolve after plants, Hanson said.

22.   Scientists wonder whether the Medaka can sustain their immunity to weightlessness over long exposures and if their offspring will exhibit the same behavior.

23.   Scientists wonder, therefore, if their strange stories reveal something of the workings of the mind.

24.   Scientists wondered how a hawk could have become infected during the winter with a virus that is only known to be transmitted by mosquitoes.

25.   Since the cause of the manatee deaths is a natural one, scientists are left wondering what, if anything, can be done should the same conditions recur.

26.   When scientists wonder about the hidden depths of a moon or planet, they often look for signs of a magnetic field.

27.   Scientists have long wondered how insects keep up that frenzy of motion.

28.   Scientists have long wondered why the unsuccessful peacocks stick around the same group year after year when the hens tend to select the same few males each breeding season.

29.   Some political scientists wondered if Bush might win the national popular vote while Gore captured the presidency with a majority in the Electoral College.

30.   Some scientists also wonder about rising water temperatures and low oxygen levels in the water.