11.   The apparatus allows researchers to observe fluid mechanics and see motions created within fluids by uniform heating of their free surfaces.

12.   The sea cucumbers of the deep Atlantic were virtually indistinguishable from those of the deep Pacific, as many a weary researcher observed.

13.   The trouble is that evolution occurs on such a vast time scale that no researcher can typically observe it.

14.   Two years later, Cornell University researchers observe monarch butterflies dying from corn pollen with killer genes spread onto wild milkweed.

15.   With divorced fathers, each researcher observed behavior as diverse as total abandonment of the children to strong father-child bonding.

16.   Researchers are simply observing the whales for now, but no one is ruling out an attempt to help them reunite with their families.

17.   Researchers observed blood vessels in their arms immediately constrict by about two to four percent.