What did you learn about on WIKENIGMA today

https://wikenigma.org.uk/start

Shoe concealment
Builders and archaeologists sometimes comes across old shoes (usually just one of a pair) which have been deliberately hidden in inaccessible places in the fabric of old buildings. Under floorboards, behind bricked-up fireplaces etc etc.

It's not known how or why the practice evolved, but a number of scholars have provided theories about possible reasons.

https://wikenigma.org.uk/content/history/shoe_concealment

Although kissing is a widespread practice among humans, few investigators have attempted to assess the adaptive significance of kissing behavior.

Chewing gum and cognition

Furthermore, a number of well-controlled studies failed to find any effects of gum chewing on cognition

Note that a number of the recent studies which found positive results for gum chewing were directly financed by chewing gum manufacturers

Might be worth removing this one.

The 'Booming Dune' phenomenon (a.k.a. 'Singing Dunes') refers to loud, low frequency (70 - 105 Hz) sound sometimes generated by sand dunes

I knew about concealed shoes! There's a project in Northampton called the Concealed Shoe Index.

Awesome! "Report a concealed shoe" lol. Less concealed carry more concealed shoes please.

https://wikenigma.org.uk/content/other/proposed_content/alphabeto

Details of the invention of Alphabeto - or Alphabet Pasta - have been lost.

a tragedy!

The 'Booming Dune' phenomenon (a.k.a. 'Singing Dunes') refers to loud, low frequency (70 - 105 Hz) sound sometimes generated by sand dunes

Kelso Dunes in the Mojave does this! Totally bizarre if you're not expecting it - sounds like a squadron of WWII bombers off in the distance somewhere

Brain sand