But if it disappeared for half a century, unfortunately even future supercomputers would not be able to work out where it had been.
By the 1960s, widespread vaccination campaigns had virtually eliminated polio from Europe and the U.S. Polio lingered in the U.S., mainly in the Amish population who refused to accept vaccinations, but it finally disappeared in 1979.
But all of it disappeared whenever a former student wrote or telephoned.
The common ground between the two parties has shrunk, but it has not quite disappeared.
Police say his silver Peugeot 306 was in a collision on the night he disappeared but it is not known if he was driving it.
His power has certainly diminished, but it has not yet completely disappeared.
GOP's advantage has not disappeared, but it is half what it was in September and only a third as large as it was in 2003, when Republicans led Democrats by 51% to 36% on this issue (see chart).
It was losing height, that was certain: for a second it seemed as if it would crash into the Plaza Hotel, but instead it slid into the corridor between two skyscrapers and disappeared from view in the direction of the Hudson.
But it was only 50 years before they disappeared from women's feet too, falling out of favour after the French Revolution.
"My passport has disappeared - one of my friends took it - but I have a ticket, " says another Pakistani man in some visible distress.
My skin felt smooth and the circles under my eyes disappeared, if only for a few days, but it was hard to know if the needles or the facial itself was responsible.
Third Avenue Value Fund owned as much as 13.8%, or 33.6 million shares, in 2008 but disappeared as a major shareholder by early 2010, when it was briefly replaced by Fidelity with a 6.8% stake and TCW at 5.6%.
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But it was interesting how once we got between those lines, that all disappeared.
The bio has disappeared from IMDB, but Uproxx has a screenshot, where it's credited to Jon C.
That disappeared in a later (almost certainly fake) render, but it's back now -- with a vengeance.
But if the pain lasts long after the shingles rash and blisters have disappeared, it's called postherpetic neuralgia.
It was designed to supply America with liquefied natural gas, but this export market has disappeared as the country's supplies of domestic shale gas have boomed.
Rockets exploded near the Diablos, and then the choppers disappeared. (They had both been hit several times, but made it back to the base in Tirin Kot, one with a fire on board.) After a few more minutes, the decision was made to retreat.
Greece is certainly being told it must live up to its commitments, but talk of a Greek exit from the eurozone has suddenly disappeared from political circles in Berlin.
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