Gerta Keller (born 1945) is a paleontologist who contests the Alvarez hypothesis that the Chicxulub caused the mass extinction 66 million years ago.
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After receiving her vocational certificate at age 17, she went to work for Pierre Cardin, where she was paid the equivalent of 25 cents per hour to sew luxury gowns that would sell for as much as $1,000 for which she was paid $12.
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The main evidence for the Alvarez hypothesis that a single impact resulted in the Cretaceous–Paleogene extinction event that killed the dinosaurs has come from the presence around the world of shocked quartz granules, glass spherules and tektites embedded in a layer of clay with extremely high levels of iridium, all signs of an asteroid impact.
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