In 1980 physicist Luis Alvarez and his son, geologist Walter Alvarez ... Coincidentally -- or not, that is around the time the dinosaurs died out. The Alvarezes hypothesized that the iridium ...

Photo: Luis (left) and Walter (right) Alvarez. Luis Alvarez was a physicist ... that a giant asteroidstriking Earth had killed off the dinosaurs around 65 million years ago. They had strong ...

Do dinosaurs still exist in some ... Working with his father, Luis, who was a Nobel-Prize-winning physicist, Walter Alvarez ...