An unexpected anomaly was found in the Pacific Ocean – and it could be a global time marker
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?
Natural History Museum%2c London1y
How deep is the ocean?
It's located in the western Pacific Ocean near the Mariana Islands. The trench's depth was first measured during the Challenger expedition in 1875. But it wasn't until the 1950s that scientists ...