Jack Sepkoski, Date of Birth, Place of Birth, Date of Death

Jack Sepkoski

American paleontologist

Date of Birth: 26-Jul-1948

Place of Birth: Presque Isle, Maine, United States

Date of Death: 01-May-1999

Profession: university teacher, paleontologist

Nationality: United States

Zodiac Sign: Leo

Joseph 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 66 mya was part of a cycle of mass extinctions that may have occurred every 26 million years.