StarTalk @StarTalkRadio
That Leo da Vinci was a smart guy, but there's something he "screwed" up. @neiltyson chats with Dr. Marilyn Smith about her work with @droneraceleague, and it leads to questions about da Vinci and his air screw design. Full episode here: https://t.co/9JvD8TFnre https://t.co/ZLHdnwaPvU — PolitiTweet.org