Last Updated: Friday, August 23, 2013, 09:22
US scientists have said that they have built the world`s most precise clock, whose ticking rate varies less than two parts in one quintillion, or 10 times better than any other.
Last Updated: Wednesday, July 04, 2012, 17:34
Scientists have been able to click the shadow of a single atom for the very first time -- an unprecedented feat crowning efforts lasting more than five years.
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