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View Resource Honor Thy Symbionts

This PNAS scholarly article explores the extraordinarily complex and dynamic environmentally transmitted consortia symbiosis of the human intestine. It analyzes the molecular foundations of beneficial symbiotic host-bacterial relationships in the gut and explains how interdisciplinary studies of the effects of the intestinal environment on genome structure and function could provide important...

View Resource Genome Sequence of Picrophilus Torridus and its Implications for Life Around pH 0.

This scientific paper describes the Picrophilaceae, which are the most acidophilic organisms known and amazingly, are able to grow at negative pH values. The authors deduce several features that may contribute to the thermoacidophilic survival strategy of P. torridus by sequencing and analyzing its 1.55-megabase genome. Specific adaptation mechanisms described and discussed include the...

View Resource Magnetite Morphology and Life on Mars

This National Academy of Sciences scholarly paper discusses the strongest line of evidence for past life on Mars based on NASA's David McKay's original claims of finding nanofossils on the ALH84001 meteorite. This study concentrates on magnetite morphology, comparing morphologies of bacterial and abiotically produced magnetite. The findings are inconclusive, but do not strongly support evidence...

View Resource Size Limits of Very Small Microorganisms Proceedings of a Workshop

This National Academy of Sciences web page provides links to discussions and papers regarding whether or not nanobacteria may be considered life forms based on size constraints. The papers and discussions follow a two-day workshop involving four panel discussions held in October of 1998. In addition to papers and discussions, the site includes links to an overview of the workshop's goals and an...

View Resource Marian Koshland Science Museum

The Marian Koshland Science Museum features state-of-the-art exhibits that present the complexities of science in an engaging and accessible way to the general public. Best enjoyed by visitors ages 13 and older, the museum explores current scientific issues at the core of many of the nation?s public policy decisions, as presented in reports by the National Academies. The website includes c...

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