The 'Aztec Death Whistle' terrified people five centuries ago. The effect seemingly is the same even now, stated the Daily Mail. This finding was confirmed by a study published in the journal ...

“Honestly, I did the most stupidest thing I’ve ever done, which is I landed from the U.K., I was so jet-lagged, and I was like, ‘I’m gonna brave through the day and make it so I can sleep at night,’” ...