There seems to be too much of a radioactive element in rocks deep in the Pacific Ocean – how did it get there 10 million years ago?

In 1917, a civil engineer pioneered the first deep-sea vehicle to attempt filming underwater. A century later, we have James ...

was first built on a barge that was fixed at its future underwater location, before being lowered into the sea and fixed to the ocean floor using steel rods. The structure sits partly submerged ...