1.   Scientists are scanning the skies with telescopes, looking for threatening objects.

2.   Scientists are scanning human populations in search of diabetes-related genes, but genetic searches can be made far faster in C. elegans.

3.   To my right, the chief scientist scans his video monitor, searching the ocean depths for unusual forms of life.

4.   Scientists scan its crater rim with binoculars as clouds of noxious gases spew out.

5.   To find out why, scientists scanned the brains of Parkinson patients as the stimulation was applied.