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Islamabad, Nov 22 : Twenty percent of the mobile users in Pakistan change their handsets thrice a year, making the country a lucrative market for manufacturers of mobile handsets and other telecom

Washington, Nov.22 : China will attempt its first space walk during the nation's third crewed flight next year, according to local newspaper reports.

Prague, Nov.

Washington, Nov.22 : A pair of physicists at the Case Western Reserve University in Cleveland, Ohio, has claimed that the observation of dark energy, thought to be speeding up cosmic expansion, mig

London, November 22 : Astronomers have discovered white dwarf stars with pure carbon atmospheres, which they say possibly evolved in a sequence that was unknown before.