ultrasonic waves

Dogs that bark loudly and persistently often bother their owners and disrupt the surrounding environment. However, with this special device, the dog will stop barking immediately.

A group of students in Indonesia has successfully built a device that uses high-frequency ultrasound to help search for earthquake victims.

The Bosnian pyramid (Europe) is one of the most controversial discoveries of the past decade. Strangely, however, they seem to have some similarities to the famous Giza Great

A recent study conducted by members of the University of Virginia technology department explained the secret that existed for 60 years about the oversized big nose of a rare bat

These bubbles have a lifetime of tens of minutes.

In the new technology, the warning signal is sent to satellites and then transferred to the rescue team on the coast.

US scientists have just released a type