Earthbound Extraterrestrial? Or Just Another Microbe in the Mud?
1.1 The Nature of Science
Observations are the wellspring of science
Hypotheses can be tested with observations or experiments or both
Experiments are the gold standard for establishing causality
The scientific method requires objectivity
1.2 The Characteristics of Living Organisms
Biology Matters: Science and the Citizen
Living organisms reproduce themselves via DNA
1.3 The Biological Hierarchy
Researchers Wrangle over Bacteria
Biology in the News: Poisoned Debate Encircles a Microbe Study’s Result
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