"It allows us to keep the system intact but lets us see within it, " said Stanford neuroscientist Karl Deisseroth, who pioneered the technique.
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Now lets see how likely it is that we could have picked Apple or Google before their growth kicked in.
The Edmunds True Cost to Own calculator lets you see how much it costs to own and operate an average vehicle.
It lets you see your book in a view that takes up the whole iPad screen.
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As you can see above, it lets gamers assemble their own pizza and have it delivered to their house without ever putting down their controller.
The generator lets you enter your name and see what it would look like if Lew signed it.
It lets shoppers click to see how a style would look in their size or in a different color palette and has customer comments scrolling by.
The firm has just successfully completed tests on a 30 kW prototype to see if its control system lets it launch, hover, generate power and land without human intervention.
He says he loves riding because it lets him meet interesting people and see new things, which is why he holds launch parties for his bikes at art galleries and trendy New York hotels.
Furthermore, if want to see ads on certain sites but not others, it lets you selectively view them.
Last year it launched LinkedIn Today, a customized news site that lets people see a front page tailored for their careers.
Will be interesting to see what privacy watchdogs make of it, but it looks pretty voluntary and lets merchants monitor the success of their social media marketing.
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One such technology is Third Voice, a browser add-on that lets anyone stick virtual Post-it Notes on any Web page, for the whole world to see.
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