The best way to look for life on other planets is to search for absorption from nitrogen in their atmospheres in the infrared region of the spectrum.

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The best way to look for life on other planets is still unclear, but one method is to search for biosignatures such as oxygen and methane in their atmospheres. While nitrogen is often used as a marker for habitable zones, its absorption spectrum is not necessarily indicative of life.

The Best Way to Look for Life on Other Planets