signals

The famous physicist said that it is necessary to be cautious when responding to aliens' signals because they can turn the Earth into colonies to exploit the material of the

A 10-year-old boy (Hong Kong man) aware of Earth's instability created an automatic earthquake warning device. When there are any earthquake signals ...

US scientists have developed a computer program that allows users to write letters and numbers on the screen by thinking about them.

A blind man in England once thought he might never be able to see the light again, but now under the help of electronic eyes, his eyesight is being restored.