Traditional sonar and radar use an echo-based approach, and have been amazingly successful in sensing and tracking vehicles and objects under water, through the air, or even in space. The principle is ...

Explore 13 animals with astonishing abilities that inspired human inventions, from robotics and medicine to everyday ...

BREMERTON — In the future, the Navy hopes to grow a fleet of ships and submarines that will have no crew on board at all, the sea versions of the aerial drones that have changed warfare in the skies ...

https://siris-libraries.si.edu/ipac20/ipac.jsp?&profile=liball&source=~!silibraries&uri=full=3100001~!414890~!0#focus ...