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Name: Calvin
Status: student
Grade: 6-8
Country: USA
Date: Winter 2011-2012

I was wondering what elements scientists have made antimatter out of and/or what elements have scientists observed made out of antimatter.I have heard that it is extremely expensive to make antimatter (approximately $250 million would produce 10 milligrams of the stuff).

Antihydrogen has been produced around 2005. The following web site has information on the production of antihydrogen:

---Nathan A. Unterman

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