The haunting wail was often the final sound heard by victims of human sacrifice in ancient Aztec ceremonies. The Death Whistle, crafted from clay and shaped like a human skull, has been discovered ...

which may also be symbolized in the Aztec death whistle.” Researchers said the sound, meant to mimic a human scream, would not only have been terrifying, but it might have been the last thing ...

Some animals can act and sound just like humans. Here’s a list of 8 such animals and birds that can mimic human speech and actions.

A dog training whistle makes sound waves that have a frequency of 40,000 Hz. Dogs ears can detect the sound, humans can’t because the frequency is above 20 kHz. In 2005, Howard Stapleton from ...