Their theory, known as the Alvarez hypothesis, is now widely accepted to explain the demise of the dinosaurs.

The Alvarez hypothesis, proposed in 1980, gave evidence for this.

Although the Alvarez hypothesis is still much debated, its supporters have gathered much geological evidence to buttress the idea.

It portrays the Alvarez hypothesis as the cause of extinction.

An important part of his research was the study of mass extinctions on the history of life, publishing on the topic well before the Alvarez hypothesis made such theorizing respectable.

Gerta Keller (born 1945) is a paleontologist who contests the Alvarez hypothesis that the Chicxulub caused the mass extinction 65 million years ago.

In her recent paper in the journal Social Studies of Science, Miss Clemens suggested that the Alvarez hypothesis owes much of its support to its relative simplicity and a favorable press.

Mentions Walter Alvarez and the Alvarez hypothesis, which wreaked havoc with the uniformitarian idea of extinction.

When it was originally proposed, one issue with the "Alvarez hypothesis" (as it came to be known) had been that no documented crater matched the event.

Subsequent research, however, identified the Chicxulub Crater buried under Chicxulub on the coast of Yucatan, Mexico as the impact crater which matched the Alvarez hypothesis dating.