* Astronomy

Autosub surveys deep ocean floor off Land's End

A British robotic sub has photographed a vast tract of deep ocean floor some 560km southwest of Land's End.
The images will be stitched together to provide a seamless view of what is happening on the seabed over an area the size of a city.
The 4,800m-deep survey was undertaken by Autosub6000, a vehicle operated by the National Oceanography Centre.
It will give scientists the opportunity to study the changing environment on the Porcupine Abyssal Plain.
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