Luis
(1911-1988)
and Walter Alvarez
(1940-)
were a father and son team
who publicized that a layer of iridium (a rare element that mostly comes
from asteroids) rich clay,
had been found worldwide at rocks marking the ending of the
Cretaceous period
(the K-T boundary). This iridium layer is supportive of the
asteriod impact extinction
theory.
Previously, Luis Alvarez had won a Nobel Prize
(1968)
for his other work
on subatomic physics.
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