"The practical applications could be very great, very exciting," Cizmar told the BBC. "The tractor beam is very selective in the properties of the particles it acts on, so you could pick up specific particles in a mixture. Eventually, this could be used to separate white blood cells, for example."from the article
I am so amazed the steps we as humans are taking each and everyday. We are quite the explorers.
At this time the team is able to move tiny particles, on a microscopic level. Moving large objects takes too much energy at the moment but as we know, tech gets better with time. This will be a cool one to follow.
edit on 1/28/2013 by mcx1942 because: edit