The Field Museum
Field Museum: Exhibits: Evolving Planet: Quaternary
Delve into the details of the Quaternary Period of the Cenozoic Era, which presents enlightening scientific data about the present-day ice age and the evolving planet.
CK-12 Foundation
Ck 12: Biology: Cenozoic Era the Age of Mammals
[Free Registration/Login may be required to access all resource tools.] Covers the Cenozoic Era, the age of mammals.