This astrobiology news article analyzes the role salt played in the evolution of life on Earth. It explains why scientists have long assumed that life originated in the sea and describes the history of water on Earth...
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...
This interdisciplinary case study looks at the importance of energy considerations within food chains using the example of Steller sea lions along the western Alaska coast. The lesson could be used in high school or...
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