What Would It Take To Say We Found Life? We Asked a NASA Expert

What would it take to say: We found life beyond Earth? Before NASA scientists make that claim, they have to be absolutely sure, from ruling out contamination to spotting chemical signals. Watch as a NASA expert explains how scientists would actually confirm evidence of life and why the bar is astronomically high. Learn more: https://science.nasa.gov/exoplanets/c... Producers: Scott Bednar, Pedro Cota, Jessie Wilde Editor: Pedro Cota Credit: NASA