This wraps up our first series of Mysteries of Science. Thank you so much for all of your comments, reviews, and to all of our contributors who spoke to us for the series.
Series two of Mysteries of Science is well underway so it won't be long before you hear from us again.
Tap follow or subscribe wherever you're listening to this to make sure you never miss an episode, and get ready for more mysteries coming soon.
Get three copies of The Week Junior's Science+Nature magazine for just £5. sciencenature.theweekjunior.co.uk/podcast is the place to claim yours.
See omnystudio.com/listener for privacy information.