Curated OER
Educational Technology Clearinghouse: Clip Art Etc: Charles Darwin
An English naturalist who established that all species of life have descended over time from common ancestry. He proposed the theory of natural selection and evolution.
Curated OER
Black Hills Institute of Geological Research, Inc.: Ammonoids
This is an Ammonoid, more commonly referred to as an Ammonite, an extinct ancestor of today's octopus, squid and nautilus.