It also could give us a new way to look deep inside our bodies without X-rays, or to look through a window into a burning building from a distance to see if anyone is left inside --without risking a firefighter's life.

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When he went to the address indicated he had a look through the window then instructed the iPad to set off an alarm so that he could check that it was in fact his.

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So rather, did Comstock look through a window created by Elizabeth or the Luteces, and see what was to come?

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