What was Walter Alvarez theory?
What was Walter Alvarez theory?
theory” formulated by American scientists Walter Alvarez and Luis Alvarez. This theory states that a bolide (meteorite or comet) impact may have triggered the extinction event by ejecting a huge quantity of rock debris into the atmosphere, enshrouding Earth in darkness for several months or longer.
What asteroid killed the dinosaurs?
Chicxulub crater
Hidden below the waters of the Gulf of Mexico, the Chicxulub crater marks the impact site of an asteroid that struck Earth 66 million years ago. The most consequential outcome of this cataclysmic event was the fifth mass extinction, which wiped out about 80% of all animal species, including the nonavian dinosaurs.
Who discovered the asteroid that killed the dinosaurs?
The crater was discovered by Antonio Camargo and Glen Penfield, geophysicists who had been looking for petroleum in the Yucatán Peninsula during the late 1970s.
Did Luis Walter Alvarez have siblings?
Robert S. Alvarez
Gladys Alvarez MeadBernice Alvarez Brownson
Luis Walter Alvarez/Siblings
What was Luis Walter Alvarez personality?
Luis Alvarez died of cancer of the esophagus at the age of 77 on September 1, 1988. He was survived by his first wife Geraldine Smithwick, and their children Walter and Jean; and his second wife Janet Landis, and their children Donald and Helen. Images of Luis Alvarez enhanced and colorized by this website.
Are any dinosaurs still alive today?
Other than birds, however, there is no scientific evidence that any dinosaurs, such as Tyrannosaurus, Velociraptor, Apatosaurus, Stegosaurus, or Triceratops, are still alive. These, and all other non-avian dinosaurs became extinct at least 65 million years ago at the end of the Cretaceous Period.
Do dinosaurs Still Exist?
When did the last asteroid hit Earth?
66 million years ago
The last known impact of an object of 10 km (6 mi) or more in diameter was at the Cretaceous–Paleogene extinction event 66 million years ago.
Did Luis Alvarez have a wife?
Janet L. Landism. 1958–1988
Geraldine Smithwickm. 1936–1957
Luis Walter Alvarez/Wife
