"The Library of Congress SCIENCE TRACER BULLET SERIES contains research guides that help you locate information on science and technology subjects. With brief introductions to the topics, lists of resources and strategies for finding more, they help you to stay "on target.""
At the official website for the magazine visitors can view the latest articles, subscribe to newsletters, read a variety of blogs, view a large image gallery, videos and listen to the Scientific American podcast.
"SciTech Connect is a portal to free, publicly-available DOE-sponsored R&D results including technical reports, bibliographic citations, journal articles, conference papers, books, multimedia and data information. SciTech Connect is a consolidation of two core DOE search engines, the Information Bridge and the Energy Citations Database. SciTech Connect incorporates all of the R&D information from these two products into one search interface. SciTech Connect was developed by the U.S.
This site contains Darwin's complete publications and many of his handwritten manuscripts. There are over 50,000 searchable text pages and 40,000 images. Also included is the largest Darwin bibliography and the largest manuscript catalogue ever published.
"The USGS is a science organization that provides impartial information on the health of our ecosystems and environment, the natural hazards that threaten us, the natural resources we rely on, the impacts of climate and land-use change, and the core science systems that help us provide timely, relevant, and useable information."