Life Through Geologic Time: A Pictorial History of Life on EarthMarquette - United States
Provides a pictorial look at the geologic time scale, beginning with the Precambrian through the Holocene.
The National Academy of Sciences is a non-governmental, non-profit organization chartered by the US Congress in 1863 at the request of President Lincoln. The Academy has two missions: to honor the nationís top scientists, engineers, and health professionals with membership, and to serve the nation with independent, expert advice. The Division on Earth & Life Studies is one of six subject area divisions that enlist the nation's top experts to resp