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 ...

An ancient Aztec Death Whistle comes with one of the "most terrifying" sounds in the world, according to experts. The item was developed in Mexico when the Mayans running the land had to protect ...

Its fear-splitting screech reverberates throughout space and time. Swiss and Norwegian neuroscientists have discovered that the ancient Aztec death whistle — often credited with emitting the scariest ...