This Web site is the online companion to the Milstein Hall of Ocean Life at the American Museum of Natural History (AMNH). The Educational Resources section provides links to dozens of AMNH activities and articles,...

Archaeopteryx is considered by many to be the first bird, being about 150 million years of age. It is actually intermediate between the birds that we see flying around in our backyards and the predatory dinosaurs like...

The Arctic Research Consortium of the U.S. (ARCUS) was created in 1988 with the goal of facilitating discussion of important arctic research initiatives, and also producing science reports with research community...

The Arizona-Sonora Desert Museum (ASDM) has been quite the authority on this unique region of the United States for well over 50 years. With funding from the Institute of Museum and Library Services (IMLS), they have...

This description of the fossil record of bacteria focuses on one particular group of bacteria, the cyanobacteria or blue-green algae, which have left a fossil record that extends far back into the Precambrian. The oldest...