Sunday, July 8, 2012
Wednesday, May 25, 2011
Sunday, December 19, 2010
Sunday, December 12, 2010
Monday, November 29, 2010
Thursday, November 11, 2010
Friday, February 19, 2010
Tuesday, February 16, 2010
The Mega Crystals of Naica Mine
Nestling up to a cauldron of pressurized, molten rock is almost never a good idea. But in Mexico's Naica mine, the payoff is worth the risk.
About 900 feet below the surface, there is a chamber filled with gypsum. It's the same stuff that goes in the drywall in your house, only in Naica it spent half a million years parboiling in a chamber filled with magma-heated water.
Suddenly miners showed up and started pumping the mineral-rich broth out to get at valuable silver and lead deposits nearby. The result is a cavern filled with crystals 36 feet long and weighing in at up to 55 tons, easily the largest in the world.
Monday, January 25, 2010
Thursday, January 21, 2010
Sunday, December 27, 2009
Saturday, December 19, 2009
Wednesday, November 25, 2009
Tuesday, November 10, 2009
Saturday, August 15, 2009
Wednesday, August 5, 2009
你懂这些名词的意思吗
你懂这些名词的意思吗 ?
主席 - 主要工作是休息 .
总裁 - 总是到处去裁员 .
老板 - 老是板起脸孔 .
经理 - 经常无所事事到处修理人 .
员工 - 原来只有我在做工 !
主席 - 主要工作是休息 .
总裁 - 总是到处去裁员 .
老板 - 老是板起脸孔 .
经理 - 经常无所事事到处修理人 .
员工 - 原来只有我在做工 !
Sunday, July 19, 2009
Subscribe to:
Posts (Atom)