4
Archaeologists have resumed excavations at the Ness of Brodgar site on the remote north-eastern Scottish island.
2
Archaeologists have unearthed a pottery shard that still bears the fingerprint of the person who made it.
5
The world's most famous unmanned submersible has made a triumphant return from its maiden voyage.
3
The humorously named research submarine is preparing to venture beneath the waters of the Antarctic.