Sea drones: What are they and how much do they cost?
Moscow has blamed Ukraine for a series of attacks by sea drones on Russian naval targets.
Category Archives: Science
Voyager 2: Nasa fully back in contact with lost space probe
Voyager 2 has restored its communication with Earth months earlier than expected.
Ocean heat record broken, with grim implications for the planet
The oceans are a vital regulator for the climate and our weather but are rapidly heating up.