method Bio-evolutionary Hypothesis for Absence of Green or Purple Stars
Take the evolutionary approach, and explain it by narrow spectra of survival-critical (evolutionarilyy rewarding) plants spectra due to narrow-spectrum chlorophyll and retinal.
method Mine life for molecules to treat bacteria
Let bacteria try to infect various plants and animals, see which adapt, and why (what proteins or molecules do they evolve), and apply it to developing new treatments.
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