PBS
Pbs Learning Media: Riddle of the Bones
At the online companion Web site of "Evolution," the seven-episode series on PBS, piece together clues to how one of our early ancestors looked as you examine images from four significant fossil finds of Australopithecus afarensis.
Curated OER
Black Hills Institute of Geological Research, Inc.: Ammonoids
Ammonoids, more commonly referred to as Ammonites, are the extinct ancestors of today's octopus, squid and nautilus. This page shows several types.