text:  And that's all the time we have for today. If you missed any part of the program or you would like to hear it again, subscribe to our podcasts, or you can now ask your smart speaker to play Science Friday. And you can join us throughout the week on social media, or how about this, our newsletters. Yeah, sciencefriday.com slash newsletters. Or you can email us the classic way, scifri at sciencefriday.com. Have a great and safe holiday weekend. We'll see you next week. I'm Ira Flater.