Trulove, Susan2015-10-292015-10-292006-11-02http://hdl.handle.net/10919/59773About 350 million years ago, at the boundary of the Devonian and Carboniferous ages, the climate changed. There was no one around to record it, but there are records nonetheless in the rocks deposited by glaciers and in tissues preserved in fossils of ancient life.In CopyrightResearchPress releaseVirginia Tech. University Relations