<p>On today’s episode: Bats in helium fly weird. Invisible lightning is creating invisible, air-cleaning substances! And one of the world's oldest science experiments involves secret treasure maps!&nbsp;&nbsp;All that and more today on All Around Science.</p><br><p>LINKS:</p><ul><li><a href="https://arstechnica.com/science/2021/05/scientists-give-bats-a-helium-voice-mess-with-their-echolocation/" rel="noopener noreferrer" target="_blank">ARTICLE: Researchers raise bats in helium-rich air to check how they sense sound</a></li><li><a href="https://news.psu.edu/story/656979/2021/04/29/research/lightning-and-subvisible-discharges-produce-molecules-clean" rel="noopener noreferrer" target="_blank"> ARTICLE: Lightning and subvisible discharges produce molecules that clean the atmosphere</a></li><li><a href="https://www.nytimes.com/2021/04/21/science/beal-seeds-experiment.html" rel="noopener noreferrer" target="_blank"> ARTICLE: One of the World's Oldest Science Experiments Comes Up From the Dirt</a></li></ul><p><br></p><p>CREDITS:</p><p>Writing - Bobby Frankenberger &amp; Maura Armstrong</p><p>Booking - September McCrady&nbsp;</p><p>THEME MUSIC by Andrew Allen</p><p><a href="https://twitter.com/KEYSwithSOUL" rel="noopener noreferrer" target="_blank"><u>https://twitter.com/KEYSwithSOUL</u></a></p><p><a href="http://andrewallenmusic.com/" rel="noopener noreferrer" target="_blank"><u>http://andrewallenmusic.com</u></a></p><hr><p style='color:grey; font-size:0.75em;'> Hosted on Acast. See <a style='color:grey;' target='_blank' rel='noopener noreferrer' href='https://acast.com/privacy'>acast.com/privacy</a> for more information.</p>