Manta rays are elegantly shaped. They swim by flapping their fins like enormous wings, and their gills filter for plankton ...

The images clearly show an experimental underwater drone shaped like a manta ray, which was supposed to remain a closely guarded secret. Manta Ray is an advanced project of the U.S. Navy ...

Satellite images showed Northrop Grumman’s Manta Ray’s distinctive silhouette docked at Port Hueneme naval base in California. The aquatic drone – which takes its name from the sea creature ...

Satellite images showed Northrop Grumman’s Manta Ray’s distinctive silhouette docked at Port Hueneme naval base in California. The aquatic drone – which takes its name from the sea creature that ...