The study of prehistoric life and fossils of plants as well as animals, is called paleontology and is addressed in this category.
Regular Blogs
Contains writings about paleontology and geology, with news and commentary about both, and once a week, there is a feature called "Random Picture Monday."
http://paleochick.blogspot.com/
Discussions here are about extinction, fossilization, and evolution and include articles including the extraction of genomes from fossils, string theory, and discoveries.
http://palaeoblog.blogspot.com/
The Open Source Paleontologist
A paleontologist writes about the methods of reconstruction of the past, findings in the paleontology field, and musings about history and prehistory.
http://openpaleo.blogspot.com/
