What concept are astrobiologists moving beyond when considering the search for life universally?

Answer

Tying life strictly to planets residing within the traditional Habitable Zone.

The traditional focus on the Habitable Zone is recognized as potentially too restrictive. Astrobiologists are broadening the search to include environments like subsurface oceans powered by non-stellar energy sources.

What concept are astrobiologists moving beyond when considering the search for life universally?
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