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Evidence for past supernovae is thin on the ground, although in 1999 German researchers found traces of iron-60 in south Pacific sediments ( Physical Review Letters, vol 83, p 18).
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Until then, the PRI (Institutional Revolutionary Party) had ruled Mexico with an iron fist for nearly 60 years and it would remain in power for another 12.
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In 1940, in Romania, the pro-Nazi Iron Guard slaughtered more than 60 aides of the exiled king, including former Prime Minister Nicolae Jorga.
CNN: Thursday,
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Last year, China investments abroad exported 60 million tons of iron ore from their mines, according to the steel association.
FORBES: China Wants to "Break Grip" of Big Three Iron Ore Exporters: Vale, Rio & BHP
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The combined company will be named Cliffs Natural Resources, and own nine iron ore facilities and more than 60 coal mines in North and South America and Australia.
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But Dragon held on, with ticket sales dropping by less than 35% each weekend (compare that to Iron Man 2 which saw ticket sales drop 60% its second weekend out).
FORBES: Hits That Don't Follow The Hollywood Script
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To get the material to assemble properly, all of the molecules had to be a specific size--11 nanometers for the iron oxide particles, each of which is 60, 000 atoms across, and five nanometers across for the lead selenium quantum dots, each of which contains 3, 000 atoms.
FORBES: IBM Nanotechnology Goes 3-D
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The exhibit, according to the museum, brings together an extensive collection -- more than 60 objects associated with Lincoln's life, including an iron wedge used to split wood in the 1830s and his famous top hat, which he wore the night he was shot at Ford's Theatre by John Wilkes Booth.
CNN: For Obama, Lincoln was model president
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Nearly 60% of Brazil's exports to China are primary goods, largely soya and iron ore.
ECONOMIST: Brazil's affair with China is going off the boil