Originally posted by Katy Lied
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The tiny specks are controlled with laser light, like the fictional tractor beam from "Star Trek," said Smalley, an electrical engineering professor at Brigham Young University.
Origin
late 18th century (in the general sense ‘someone or something that pulls’): from Latin, from tract- ‘pulled,’ from the verb trahere .
late 18th century (in the general sense ‘someone or something that pulls’): from Latin, from tract- ‘pulled,’ from the verb trahere .
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