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| | Luis Alvarez at AllExperts |
 | | Luis Walter Alvarez (June 13, 1911 – September 1, 1988) of San Francisco, California, USA, was a famed physicist of Spanish descent, who worked at the University of California, Berkeley. |
 | | Alvarez and his student Lawrence Johnston designed the detonators for the spherical implosives used on the Trinity and Nagasaki bombs. |
 | | In 1980, with his son Walter Alvarez, a geologist, Luis proposed the asteroid-impact theory to explain the iridium anomaly of the K-T extinction boundary, the observed increased abundance of iridium in strata of that time. |
| en.allexperts.com /e/l/lu/luis_alvarez.htm (520 words) |
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