1 - More than one-fourth of the honeybees in the United States have disappeared since last fall, and scientists are trying to figure out why.

2 - From the orbits of the satellites circling the moon, astronomers were able to figure out the exact location of the center of the moon.

3 - Several research groups have been racing to figure out how to regenerate hair cells.

4 - Neuroscientists have acquired knowledge of structures in the brain, but this knowledge by itself has not enabled them to figure out how the brain functions to perform the mental process we use in speaking.

5 - For decades, scientists have debated how the brains of young children figure out how to communicate using language.