21.   Their goal is to use beams of infrared light, reflecting from all surfaces in a room, to create high-speed information networks.

22.   They used laser beams to gently manipulate an atom, essentially putting it in two places at once.

23.   To keep costs down, no beams were used, so the passages had to be narrow to avoid collapse.

24.   Using beams of radiation from an outside source to destroy cancer cells in the prostate is a less invasive but less effective treatment.

25.   Union officials have said they want all regional mail-sorting facilities to be equipped with machines that use electron beams to kill anthrax spores.

26.   At Lake Galena in suburban Philadelphia, biologists from the USDA used laser beams to sweep a lake clear of geese in January.

27.   Biologists, for example, could use the beams to study how molecules of HIV reproduce themselves inside human genes.

28.   The three smoke detectors in the lab use laser beams to measure particles in the air, and are extremely sensitive.

29.   Using laser beams, performers told the story of cricket.

30.   Using laser beams like tweezers, a Japanese researcher has managed to tie incredibly tiny knots in strands of DNA.