The alleged attack on U.S. State Department officials in Cuba has made weapons that use sound a national conversation. Acoustic weapons are not just in the arsenals of countries unfriendly to America.

In recent months, questions have grown about how far governments are willing to go to maintain control. Serbia now finds itself at the center of a troubling debate. Serbian intelligence services have ...

Tourists ride in vintage American convertible cars past a U.S. and Cuban flag outside the U.S. embassy in Havana, Cuba. Credit: Ramon Espinosa/AP/REX/Shutterstock The ...

An old toy has inspired a powerful new weapon that could destroy submarines or annihilate tumors. Using a modified version of Newton's cradle, a series of stainless steel balls suspended by fishing ...

Imagine walking through a field on a cloudless day when you suddenly hear the 130-decibel roar of a fighter jet. But you can’t spot the jet, or even tell which direction the sound is coming from.