sweep. it is going to get what we call a spectra. if you think of a nose sniffing out the chemicals in the atmosphere and if you find a sufficient number of biomarker molecules that you may be able to say, there is life on that planet. do you think there is life on other planets? this has been your life s work. absolutely. do you think there is life? you do. i do. listen, i observed that life exists on planets right? here on earth. i observe intelligent life exists. so it works. but what is the chance of there being multi cellular life? that depend on the interaction of the planet and the planet s star. here on earth we re lucky because we have a transparent atmosphere so our planet is bathed in light. if you live on venus you don t even know stars exist because the atmosphere is too thick. now if you get abundant, multi cellular life do you get intelligent life? possibly.