Jack Sepkoski
J. John Sepkoski Jr., (July 26, 1948 - May 1, 1999), was a University of Chicago paleontologist. Sepkoski studied the fossil record and the diversity of life on Earth. Sepkoski and David Raup contributed to the knowledge of extinction events. They suggested that the extinction of dinosaurs 65 mya was part of a cycle of mass extinctions that may have occurred every 26 million years.
Read more about Jack Sepkoski: Life and Work, Awards, Selected Publications, Further Reading
Famous quotes containing the word jack:
“The beast exists because it is stronger than the thing that you call evolution. In it is some force of life, a demon, driving it through millions of centuries. It does not surrender so easily to weaklings like you and me.”
—Martin Berkeley, and Jack Arnold. Lucas (Nestor Paiva)