This NASA website provides a summary of a study led by NASA's David McKay that may provide evidence for past life on Mars. McKay and his team found carbonate globule features on the ALH84001 meteorite that appear to be nanofossils. In addition, secondary mineral phases and hydrocarbons provide further evidence for past life. The website features color photographs as well as links to related web pages.
This California State University lesson plan contains materials for a five-part activity regarding whether or not nanobacteria are alive. The case-study based activities include: What does it mean to be alive?; What evidence is there that nanobacteria are alive?; More evidence of life; Corroborating evidence (?); and The final chapter (or is it?). The website contains pertinent general information articles and resource lists for students as well as homework assignments based on readings. An answer key is provided, but may require registration to the Case Study in Science Program.
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