Though to be fair, SETI is specifically looking for "intelligent" life. It may be possible to identify biosignatures on other planets, like looking for evidenc

Though to be fair, SETI is specifically looking for "intelligent" life. It may be possible to identify biosignatures on other planets, like looking for evidence of atmospheric gasses far from ordinary chemical equilibrium (like how microbes emit methane here on Earth), or unusual spectra, like spotting the signature of chlorophyll absorption.