They are three words that, after next week, will never be used to describe Pluto again, and they are about to witness their own expiration: "Not yet explored." The phrase appears on a 1991 29-cent U.S. stamp flying on New Horizons.
They are three words that, after next week, will never be used to describe Pluto again, and they are about to witness their own expiration: "Not yet explored." The phrase appears on a 1991 29-cent U.S. stamp flying on New Horizons.
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