many of you will know alan alda as the star of the classic hit tv show "mash," playing the lead role hawkeye" pierce. what you may not know is that alda, now in his 80s, has spent the past decade channeling his creativity into the art of communication, teaching students at the alan alda center for communicating science. and our michel martin sat down with him to talk about his work, which is coaching people how to communicate complex ideas, especially relevant for these divisive times. here's their conversation. >> alan alda, thank you so much for joining us. >> thank you. >> gosh, you've done so many things in your life. i mean, people of course know you for hawkeye pierce and appearing on "mash," which is still, you know, one of the most watched -- the final episode one of the most watched tv episodes of all time. many people may not know that you also wrote many of the episodes. but you have this whole other life as a student of communication, as a person who's actively trying to help other people communicate better, particularly in the scientific realm, but beyond that. so, how di