The tiny tunnel is a way to test that the force is still sort of working. The stickiness of this like capillary force can kind of like pull water up a tube. They were so delicate and so hard to make, it takes more than three years time to finish. So theoretically, you could build the world's tiniest sand castle.
Sam Sanders, host of Vulture’s Into It podcast, is in the hot seat for a new episode of our game show. Can he guess which sandy mystery has been solved and which ones are still unexplainable?
For more, go to http://vox.com/unexplainable
It’s a great place to view show transcripts and read more about the topics on our show.
Also, email us! unexplainable@vox.com
We read every email.
Support Unexplainable by making a financial contribution to Vox! bit.ly/givepodcasts
Learn more about your ad choices. Visit podcastchoices.com/adchoices